The rate at which Alka-Seltzer tablets reacts with water Statement of problem The aim of the experiment is to find out the rate at which Alka-Seltzer tablets react with water. The input variable that I will change is temperature. The output variable will be measured by the time it takes for the Alka-Seltzer tablets to dissolve. Input variables In this experiment there are two main factors that can affect the rate of the reaction. These key factors can change the rate of the reaction by either increasing it or decreasing it. These were considered and controlled so that they did not disrupt the success of the experiment. Temperature- As the temperature increases, the movements of molecules also increase. This is the kinetic theory. When the temperature is increased the particles gain more energy and therefore move around faster. This gives the particles more of a chance with other particles and with more force. The increase in temperature will therefore increase the rate of reaction. As this is the variable I am measuring I will not keep the temperature constant and therefore I will be varying it. Volume of water- if the volume of the water is increased there is more likelihood that there will be more collisions. This is because there are more water molecules in a given volume to react with the Alka-Seltzer tablets. However if there are sufficient water molecules to occupy the Alka-Seltzer tablets an increase in the water molecules will not alter the rate of the reaction. This is because the Alka-Seltzer tablets are already working as fast as they can to react with the water. The concentration can be increased by increasing the volume of the water used in the reaction to dissolve the Alka-Seltzer tablets in. To control the... ... middle of paper ... ... different from what it should be. To solve this problem a thermostatic water bath could be used as stated above. * If the stop watch was stopped to early or late, again the overall reading would not be as accurate as it could have been. * It was almost impossible to tell when the Alka-Seltzer tablet had dissolved, each time the experiment was done. This was a huge problem for the experiment as this could have totally caused problems to the experiment. A special type of detector apparatus, which bleeped when the correct amount of Alka-Seltzer tablet dissolved, could improve this, each time the experiment was done. This would give us an extra measure of accuracy each time. Another way to improve the experiment and to produce consistent readings was to used distilled water. This is because the distilled water contains no impurities and therefore no hardness in water.
2. Put a few ice cubes in one beaker of water and wait until it is 16 °C to remove them
It is important however to note that the NH4 and K ions are still in
...at over planting can do to the land, the majority of the United States just moved on and continued to treat the land just as poorly as before. John Pursell views chemical fertilizer as a thing that turns soil into “chemical wasteland” and mentions that today’s soil is often not good enough to resist heavy rainfalls.
Queen Elizabeth’s mother, Anne Boleyn, had a pretty rough time. After “marrying” Queen Elizabeth’s father, Henry VII, she became the queen. Soon after she became pregnant, everyone was preparing for the little prince, Prince Edward, but whenever Anne Boleyn’s due date came she had a little girl, Princess Elizabeth. After many failed attempts at conceiving, the king became angry and started to think of a way to end their marriage. With the help of a few of Anne’s enemies at court, King Henry started an investigation. Anne was eventually arrested on the charges of adultery, incest, and plotting to murder the king. With limited evidence, she was found guilty and sentenced to death by beheading. On May 19th, Anne was privately executed.
For years farmers have been adding natural fertilizers to their crops. It is a big risk though. Over fertilizing is very dangerous. It puts high concentrations of salt into the soil. It can also affect the water resources nearby. Nitrogen, Phosphate, and Potassium are the basics of fertilizer. If a certain nutrient is short in supply the fertilizer might not work as well. Calcium, iron, manganese are also nutrients that might be needed. So don’t just trust the fertilizer bag that says it has all the nutrients, test it out. (Miller and Levine 717)
This source was written by Ruth Lo, who is affiliated with the School of Nursing and Health Care Practices, Southern Cross University. This study examined the stress levels among college nursing students. The study revealed the high level of stress the students felt they had. It explained different ways, both beneficial and detrimental, the participants chose to deal with their stress. Different sources of stress were mentioned. Another major topic was how the participants successfully decreased their perceived stress levels. This was discussed in various categories such as: studies, family, and personal. The author compared the results received over several years of testing and explained the differences between the years. They then drew conclusions from their study about the true impact of stress on the college students. This study will be used to provide
With the large and growing population, food sources are increasingly more important. In order to increase the crop yield, fertilizers are used. These fertilizers can come in two forms, inorganic and organic. Also, though these fertilizers may help the human race increase food supply, fertilizer, in excess, can damage the natural environment, killing other organisms. Fertilizer is comprised of three major macronutrients and whether it is organic or inorganic, it can have negative effects on the environment.
Effect of Temperature on the Rate of Reaction between Sodium Thiosulphate and Hydrochloric Acid Investigation Chemical reactions are used in our everyday life, they literally keep us alive. They are used in food, respiration and everywhere else in the environment. A chemical reaction mainly occurs when reactants react together to produce a new product. The speed at which this reaction takes place is called the rate of reaction. The product produced has a number of particles in the solution that has formed from the reactants.
Investigating Reaction Rates of Sodium Thiosulphate and Hydrochloric Acid Aim: To investigate the rate of reaction of Sodium Thiosulphate and Hydrochloric acid. In this investigation I will be varying the concentration of Sodium Thiosulphate only and not the Hydrochloric acid concentration. In this investigation I will use the following word equation: Sodium Thiosulphate + Hydrochloric acid In this investigation I will use the following symbol equation: Na2S2O3 + Hcl Prediction: I predict that as the Sodium Thiosulphate concentration increases the rate of reaction will also increase. The reason I predict this is because there will be a higher concentration of particles and so a faster reaction would be able to occur-
from 10cm to 50cm to make it easier to see the difference in a graph.
In the past few decades school has shifted its focus from education to fashion. Students are judged upon their shoes or jeans rather than their knowledge. Uniforms in the public education system is a great idea, not only is it cost effective, but also it gives the students a chance to concentrate on their studies and not have to worry about what to wear tomorrow. Plus the crime or violence rate drops in schools that have a uniform policy, and those that do not belong on campus are spotted quicker and easier. Private schools have already adopted this idea as well as some schools in England and Australia. Early morning or late evening fights over what is allowed to be worn to school could come to an end if uniforms are issued in the public school system.
“We cannot forget that reinforcing economic differences drives students further apart when schools should be drawing them closer together.” There are many problems in public schools with no uniforms. The use of school uniforms could eliminate some of these problems. Although school uniforms may take away a child’s individuality, there are more benefits than disadvantages to having school uniforms in public schools because school uniforms lessen the money spent on the latest fashion trends and school uniforms provide a positive school climate.
To start off, Audrey Hepburn was born on May 4, 1929, to an english father and a dutch mother in Ixelles, Belgium. At birth, she was given the name Audrey Kathleen Ruston, but took up the name Audrey Hepburn for the big screen because of her father’s surname. Growing up, Audrey lived her early life under the Nazi occupation. Although it was unknown at the time, Audrey’s father was a true Nazi sympathiser. When her mother found out his secret allegiance to Hitler, as well as another secret that Hepburn’s father was sleeping with their nanny, they divorced and he immediately left the family. (biographyonline.net) Because of that, and her being under Nazi occupation, Audrey suffered from depression and malnutrition. It was also relayed that Audrey Hepburn used to act as a courier during the war and carry messages to others in her ballet shoes behind the backs of the Nazi's supervision. (audrey1.org)
Chemical farming has become such a cultural norm that humans have turned a blind eye to what is really happening behind the scenes and have come to accept what the big manufacturing companies have told us. What these companies don’t want us to know is that when you produce food on a conventional farm you are producing food that is harmful to the environment. Conventional farms use fossil fuel derivative fertilizers to help add nutrients to the soil, but “these are the reason the earth is experiencing dangerous climate changes” (Sustainable Table). Also, the quality and consistency in the crops are lowered when they are planted on a chemical farm because many companies use artificial manure that leads to “artificial nutrition, artificial food, artificial animals and finally artificial
My aim in this piece of work is to see the effect of temperature on the rate of a reaction in a solution of hydrochloric acid containing sodium thiosulphate.