Color Change Chemical Volcano Demonstration

Color Change Chemical Volcano Demonstration There are several chemical volcanoes that are suitable for use as a chemistry lab demonstration. This particular volcano is nice because the chemicals are readily available and may be safely disposed after the eruption. The volcano involves a color change of the lava from purple to orange and back to purple. The chemical volcano can be used to illustrate an acid-base reaction and the use of an acid-base indicator. Color Change Volcano Materials goggles, gloves, and a lab coat or apron600 ml beakertub large enough to accomodate the beaker200 ml water50 ml concentrated HCl (hydrochloric acid)100 g sodium bicarbonate (NaHCO3)bromocresol purple indicator (0.5 g bromocresol purple in 50 ml ethanol) Make the Chemical Volcano Erupt In the beaker, dissolve ~10 grams of sodium bicarbonate in 200 ml of water.Set the beaker in the middle of of the tub, preferably inside a fume hood, since strong acid is used for this demonstration.Add around 20 drops of indicator solution. Bromocresol purple indicator will be orange in the ethanol, but will turn purple when added to the basic sodium bicarbonate solution.Add 50 ml concentrated hydrochloric acid to the purple solution. This will cause the eruption in which the simulated lava turns orange and overflows the beaker.Sprinkle some sodium bicarbonate on the now-acidic solution. The color of the lava will return to purple as the solution becomes more basic.Enough sodium bicarbonate will neutralize the hydrochloric acid, but it is best to handle only the tub and not the beaker. When you are finished with the demonstration, wash the solution down the drain with plenty of water. How the Volcano Works changes color the sodium bicarbonate HCO3- H ↔ H2CO3 ↔ H2O CO2

IDENTITY DEVELOPMENT essay

IDENTITY DEVELOPMENT essay IDENTITY DEVELOPMENT essay IDENTITY DEVELOPMENT essayAbstractI’m a black male who was raised by a single mother. My mother not only raised me, my identical twin brother, and our older brother, but she also raised foster children. My mother had a burden to help those in need. Although society considered our family â€Å"dysfunctional†, because there was no father figure around; my mother was able to look past our current situation and seek out those in need and provide a service to them.Due to a job related injury, my mother was unable to work; therefore, she volunteered at the Salvation Army in the soup kitchen where she would serve food to poverty stricken people of our community. She also assisted in a program at the Salvation Army that is similar to Girl Scouts, but it was called the Sunbeams. I started to realize that a majority of the individuals at the soup kitchen were black. Plus, a majority of the kids that attended Sunbeams were black, and came from dysfunctional homes. I did not realiz e at the time that I would develop a passion to help under privileged juveniles especially black juveniles.The following paper deals with the vital matter of racism and the way black people adapt in the predominant white society. The paper contains examples from my personal experience and explains in detail how I managed to come to a conclusion that the only way to find oneself in life is to see the hardships of people around you and finally develop one’s own identity with this background. Thus, my personal experience has shown that even though I grew up in a dysfunctional family, I managed to develop my identity to full extent. And at the end, I finally realized what my path in life should be, and that is helping black people, particularly juveniles that need support and assistance.  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Key words: racism, identity development, inequality, stereotypes.Finding oneself in lifeAs I grew up, I realized that my mother had left her imprint on my life and the life of others. In the aforementioned paragraph I mentioned my mother was a foster parent. According to the state of Texas’ statistics, black children are over represented in the foster care system more than doubling their population (Pyle, 2009). Progress has been done to the system and officials agree to the disproportionality of one race in a program. The problem is complex but there is no quick fix or easy solution. In Texas, 26 percent of children removed from their homes last fiscal year were black, despite making up only 12 percent of the states children population, according to Childrens Protective Services. In the region, black children comprised 17 percent of cases, though only making up 6 percent of the population (Pyle, 2009).The foster children who actually stayed in our home for a long period of time were able to succeed in life. There were three black foster children who spent years with our family. They all entered our homes at different times . There was one male named Deandre and two females named Shatara and Michelle. Deandre graduated college and moved to Minnesota where he became a counselor working with teens and young adults. Shatara did not pursue college, but remains in Freeport where she works a full time job. Michelle entered our family two days after she was born with cocaine in her system. Michelle’s parents are from the Chicago area. Michelle’s parents were given the opportunity for Michelle to return home, but the parents never upheld there part of the deal with the Department of Children and Family Services (DCFS). My mother who gave birth to three boys had the opportunity to have a daughter by adopting Michelle.   Michelle graduated from high school with a 4.0 and then attended our local community college, from which she graduated with high honors and was accepted into the honor society.   Michelle is currently attending Howard University in Washington DC and is pursuing a degree in poli tical science; her goal is to become a corporate lawyer.Thus, it is obvious that even being black, a person can find oneself in life. Here, it should be admitted that if you have a kind heart and are passionate about helping those in need, you will be later rewarded by the well-being and success of those you once helped. Judging from the examples given above, one can see that despite racism present in our country, even black people can become successful in life, graduating from educational institutions and occupying high positions in different spheres of life.My own career choiceAs a teenager, I decided I wanted to be like my mother and help people.   I told myself that I was going to be a pastor, or a police officer. I soon realized that being a pastor was way harder than I thought. Being a pastor took a lot of discipline. As a pastor, I would have to study the Bible frequently in order to be prepared to deliver a Sunday morning message, Sunday night message, and Wednesday night message. I decided being a police officer was a better career choice for me.I spent my first five years as a police officer working in a predominately poverty stricken black area of the city. While working in this neighborhood, I helped facilitate programs that would connect the community and the police.   I wanted to establish a bond with the adults and adolescents in the community. The police department created a substation in this community where the Community Oriented Policing Unit (COP) worked out of. Myself and the other officers associated with COP developed a bicycle club called Wheels for Winners that met at the substation. COP officers were authorized to use stolen/lost bicycles that went unclaimed in the bike club. The neighborhood kids were shown how to disassemble the bikes including the internal components. The kids were then shown how to re-assemble the bicycle, and once they had completed working on the bike they were allowed to keep the bike. Plus, the police depa rtment received a grant to purchase brand new bicycles, which the students could ride when we took them on long rides and camping trips.Thus, one can see that there are many prospects and opportunities for a black person to find oneself in life, despite all the racism related problems. To proceed with this question, I will give one more example. Thus, the COP unit created another program called Kids and Police Serving (K.A.P.S). The neighborhood juveniles along with COP officers went on different trips to different states like Atlanta Georgia. The juveniles learned anti drugs, anti gang and other messages, and were taught how to perform skits and dramas based off of these anti messages. The students practiced these skits until they were comfortable enough to perform the dramas at different schools and organizations.These programs allowed me to see that juveniles’ especially young black juveniles who are given guidance and direction have the potential to break stereotypes. Som e of the juveniles went on to graduate college, some joined the workforce after high school, and some lived up to the stereotype. Here, it needs to be mentioned that judging from the above-mentioned examples, one can see that even black people living in the world full of stereotypes against them can become rightful citizens of the community.I felt pride that although Wheels for Winners and K.A.P.S did not save 100% of the participants it did give 100% of the participants the same chance to connect with influential people outside their community who they could use as a mentor .  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Access of black people to quality educationI transitioned to a new assignment where I worked as a School Resource Officer.   I worked at the high school, the middle school, and the alternative school which are all near each other.   The first year at the school I did a lot of arresting students for violating the law. The second year at the school, I became the as sistant wrestling coach and being the wrestling coach caused the students to humanize me; although throughout the school day I was dressed in full uniform. The students perception of me changed they did not perceive me as being a threat to them looking to take away their freedoms. I was able to make connections with students and was asked to be a mentor for one of the elementary schools. In the Ebony magazine (2007) an actor by the name Kodjoe who comes from a divorced household stated, â€Å" it is time for black men to step up and be fathers, because 80 % of black children live a portion of their lives without a father, being present in the household† (Samuel, 2007).Black fathers need to show the world that we are devoted, dedicated, and dependable (Samuel, 2007). I mentored two black males at the elementary school. The curriculum that was provided was from a book called â€Å"The Talk my Father never had with me†. The following school year I was asked to mentor five high school students. During the first session, I realized that all five students were black and lived in a single parent home.   I mentored one of the students for only two weeks before I arrested him for breaking into the school after hours and vandalizing school property.   I would have continued to mentor him but he was expelled from school.Here, it needs to be stated that African-American students, who make up slightly less than half of those enrolled in Chicago Public Schools, face harsher discipline than their white and Latino classmates but have better access to quality education than minority students in other large, urban districts, according to a study to be released by the U.S. Department of Education (Hood, 2012). Students with Voice of Youth in Chicago Education held a news conference outside the Cook County Juvenile Center, calling on Mayor Rahm Emanuel to end extreme discipline policies that, they say, are forcing African-American and Latino students out of scho ol (Hood, 2012).IDENTITY DEVELOPMENT part 2 essay

How to Manage and ID Japanese Maple

How to Manage and ID Japanese Maple Japanese maple is one of the most versatile trees for any yard, patio, or garden. Often grown for its unique 7-palmed green or red colored leaf, the maple also has an interesting growth habit, with a fine leaf texture and muscular-looking multiple trunks. Japanese maples have extraordinary fall colors that range from bright yellow through orange and red, and is often striking, even on trees grown in total shade. Specifics Scientific name: Acer palmatum Pronunciation: AY-ser pal-MAY-tum Family: Aceraceae USDA hardiness zones: USDA hardiness zones: 5B through 8 Origin: not native to North America Uses: Bonsai; container or above-ground planter; near a deck or patio; trainable as a standard; specimen Availability: generally available in many areas within its hardiness range Physical Description Height: 15 to 25 feet Spread: 15 to 25 feet Crown uniformity: symmetrical  canopy  with a regular (or smooth)  outline  and individuals have more or less identical crown forms Crown shape: round; vase shape Crown density: moderate Growth rate: slow Texture: medium Foliage Descriptions Leaf arrangement: opposite/subopposite Leaf type: simple Leaf margin: lobed; serrate Leaf shape: star-shaped Leaf venation: palmate Leaf type and persistence: deciduous Leaf blade length: 2 to 4 inches Leaf color: green Fall color: copper; orange; red; yellow Fall characteristic: showy Popular Maple Cultivars There are many cultivars of Japanese maple with a wide variety of leaf shapes and color, growth habits, and sizes. Here are some of the most popular: Atropurpureum - has reddish leaves with only five lobes  Bloodgood - new foliage is bright red, some leaves darkening to a dim green  Burgundy Lace - reddish foliage with cut leaf (sinus nearly down to the petiole)Dissectum - finely dissected leaves in green or red, growing 10 to 12 feet tall  Elegans - leaves with rose-colored margins when they first unfold  Ornatum - leaf is beautifully cut and reddish Trunk and Branch Descriptions Trunk/bark/branches: bark is thin and easily damaged from mechanical impact; droop as the tree grows, and will require pruning for vehicular or pedestrian clearance beneath the canopy; routinely grown with, or trainable to be grown with, multiple trunks; showy trunk; no thorns Pruning requirement: requires pruning to develop a strong structure Breakage: resistant Current year twig color: green; reddish Current year twig thickness: thin Pruning a Maple Most maples, if in good health and free to grow, need very little pruning. Only train for developing a leading (or multiple) shoot(s) which will eventually establish the trees framework. Maples should not be pruned in spring and could bleed profusely. Wait to prune until late summer to early autumn and only on a young tree. A habit should be encouraged in which the branches develop low and grow up at sharp angles. If suckering of green-leaved root stock occurs below the graft line on your red-leafed grafted variety, remove the green sprout immediately. Japanese Maple Culture Light requirements: tree grows best in part shade/part sun but can also handle the shade. Soil tolerances: clay; loam; sand; slightly alkaline; acidic; well-drained Drought tolerance: moderate Aerosol salt tolerance: none Soil salt tolerance: moderate Common Pests Aphids can infest Japanese maples and heavy populations can cause leaf drop or a dripping of honeydew. Scales can be a problem. Neither insect will cause the tree to die. If borers become active, it probably means you have an already sick tree. Keep the tree healthy. Leaf scorch  may become a problem during periods of high temperatures accompanied by wind. Planting Japanese maple in a bit of shade will help. Keep trees well-watered during dry periods. Symptoms of scorch and drought are tan dead areas on foliage. Bottom Line The growing habit of a Japanese maple varies widely depending on cultivar. From globose (round or spherical form) branching to the ground, to upright to vase-shaped, the maple is always a delight to look at. The globose selections look best when they are allowed to branch to the ground. Be sure to clear all turf away from beneath the branches of these low growing types so the lawn mower will not damage the tree. The more upright selections make a nice patio or small shade trees for residential lots. A large selection or compact cultivars make wonderful accents for any landscape. Japanese maple tends to leaf out early, so it may be injured by spring frosts. Protect them from drying winds and direct sun by providing exposure to partial or filtered shade and well-drained, acid soil with plenty of organic matter, particularly in the southern part of its range. Leaves often scorch in hot summer weather in USDA hardiness zones 7b and 8, unless they are in some shade or irrigated during dry weather. More direct sun can be tolerated in the northern part of the range. Be sure drainage is maintained and never allow water to stand around the roots. The tree grows fine on clay soils as long as the ground is sloped so water does not accumulate in the soil. It responds well to several inches of mulch placed beneath the canopy.

Diet and Exercise Can Help Loose Weight Essay Example | Topics and Well Written Essays - 500 words

Diet and Exercise Can Help Loose Weight - Essay Example Rather, the issue should be more on what benefits one can get when dieting or exercising or when practicing both. Studies show that exercise can help a person control his weight as well as dieting does. When exercise alone is practiced without watching one’s diet, prolonged physical activity is needed in order to burn the fat taken along with food consumption if weight management is desired. On the other hand, watching one’s diet without exercise can also help reduce or maintain weight depending on the person’s objective. It is a known fact that fruits and vegetables are a great help to one who wants to maintain his weight so that increased intake of such would be most beneficial especially in getting the fiber which is most needed in keeping one’s system clean. In addition, exercise and diet help reduce the risks of certain chronic diseases like cancer and heart attack. Regular exercise boosts high density lipoprotein otherwise known as good cholesterol a nd reduces triglycerides, allowing a smooth blood flow with the lowered build up of plaques in the arteries (Mayo Clinic Staff, 2010).

September 11, 2001 Essay Example | Topics and Well Written Essays - 2000 words

September 11, 2001 - Essay Example wo wars, markets to suffer, travel and tourism to decline and led to America adding security measures to attempt to ensure that a similar attack will never again occur on American soil. Stock prices are indicative of how optimistic individuals feel about the future. Terrorism disrupts the stock market by causing panic, and pessimism, as people decide, in droves, that their money is better off in a more secure institution or investment (Chen & Siems, 2004, p. 349). Chen & Siems (2004) researched the impact of 9/11 on world markets, in comparison to other historical terrorists events that have occurred worldwide, including the sinking of the Lusitania, the bombing of Pearl Harbor, the invasion of France, different airline bombings, the invasion of Kuwait, the World Trade Center bombing and the Oklahoma City bombing. 9/11 had the potential for a large impact on world markets, not just because of fear, but because the world trade infrastructure was disrupted because of the destruction of the twin towers (Johnston & Nedelescu, 2005, p. 5). What they found was that, while there was a significant negative impact on the stock market for 9/11, in that it stocks were off almost 8%, compared to almost 3% for Pearl Harbor, less than 2% for the invasion of Kuwait, and an increase of almost 2% for Oklahoma City, the stocks rallied much faster than many of the other events listed. For instance, the stocks did not rally after Pearl Harbor for 232 days, after the invasion of Kuwait there was not a recovery for 134 days, and, after the invasion of France, stocks did not recover for over 2 Â ½ years (Chen & Siems, 2004, p. 354). What they also found was that all 34 world markets that they examined had a negative market impact on the day of the tragedy, with 94% experiencing almost an almost .01% decline, and Helsinki and Austria experiencing a .10% decline (Chen & Siems, 2004, p. 358). However, after 11 days, almost all of the markets had recovered, and that 82% of world

Ethics in the Engineering Profession Assignment

Ethics in the Engineering Profession - Assignment Example Thereafter, the consequences of the choices and decisions made in the situation are reviewed, and finally an analysis of the impact the code of ethics on the conduct of engineering professionals is discussed. A facility was needed to store water in a reservoir. The water to be stored was to be drawn from the reservoir by a separate system. The required system was expected to manage the level of water in the storage reservoir. The engineers in the situation used digital signals in which the PLC had two digital inputs, that is, empty reservoir and full reservoir. The digital output of the PLC is used to open and lock the inlet into the reservoir. When the two switches are off, the PLC opens the valve to let in more water. In the event that both switches are on, the PLC by design shuts the inlet to prevent overflow. Float switches were used to avert a situation in which any use of water opens the valve or activates, and subsequently deactivates the pump for a stint, making the system wear down quickly. The analog approach may use water and a valve, which can be adjusted. As for the PLC, a PID reaction loop could be used to regulate the opening of the valve. The engineers tasked with this duty were not getting on well and hence had challenges in communicating to one another; therefore, their ultimate goal lacked objectivity. The system they designed did not optimize the refill rates because one engineer failed to advise the counterpart that using both options of analog and digital system would be the best option to the problem. They ended up using the digital system. The two engineering professionals failed to effectively communicate; hence, performed the activity with dishonesty and without objectivity. The solution they offered the client will cause economic loss since the refill rates were not optimized even though it was possible for the two to ensure it happened. Clearly, the engineering code of ethics three was violated as objectivity and

Leadership Essay Example | Topics and Well Written Essays - 1250 words - 15

Leadership - Essay Example Just as with any other business, the school’s primary objective is to improve the quality of education since the business centers on the provision of education services. This way, the capacity of the school improves. As indicated, a principle is both a leader and a manager. This requires the new principle to adopt management and leadership theories that change the performance of the school within the shortest time possible. Among the vital aspects of management in the facility is human resource management. The members of staff are the primary resources at the facility and therefore require effective management in order to improve the performance of the school. However, the analysis of the forty-one member staff portrays a grim picture of the schools future. Among the first management operations, that the new principle must carry out is employee evaluation. The evaluation will help the manager make appropriate decisions on the management of the school. As the study portrays, some of the teachers are unmotivated while others have no expertise. The staff assessment will help the principle determine the appropriate number of teachers to retain. The new principle must inherit a lean and equally efficient staff. Efficiency of the staff relies on their level of motivation and enthusiasm. Those who the analysis proved to lack expertise must quit the facility while the rest must promise to work efficiently. Management theory of leadership is the most appropriate in the circumstance. The theory centers on the roles of employee supervision, group performance and employee motivation among many other vital features of an organization. The theory dictates that the leader must have absolute understanding of employee psychology in order to formulate and implement policies that will steer growth and prosperity in the organization. Among the vital employee, motivational theories that