The reaction rate will be measured by the rate of production of oxygen gas as hydrogen peroxide is
After adding the acetic acid and hydrobromic acid to the solution, and heating and recrystallizing the solution, the product triphenylmethyl bromide was created and had a mass of 0.103 g. The theoretical yield was calculated by determining the limiting reagent in the reaction. The triphenylmethanol was the limiting reagent in the reaction. The total amount of mass from the triphenylmethanol was converted to moles by using the molar mass of the triphenylmethanol. The amount of moles was then converted into grams to determine the theoretical yield, 0.125 g. The percent yield was then calculated by dividing the actual yield by the theoretical yield and multiplying the result by 100%. The percent yield was 82.4%.
PURPOSE The purpose of this experiment is to conduct a single displacement reaction using a reactant with impurities to deduce its effects on the actual yield of the precipitate by calculating percentage yield. INTRODUCTION In chemical reactions, there are limiting reagents which control the maximum yield of products. On the other hand, excess reactants are other reactants in a reaction that are left over or remain after the limiting reagent has been completely consumed.
As seen in table 1, the theoretical yield was .712 g of C_17 H_19 NO_3. The % yield of this experiment was 7.51 % of C_17 H_19 NO_3. . This low yield can be explained from a poor recrystallization technique combined with potential contamination. Throughout the experiment, the mixture changed color from green, orange, to yellowish lime, and eventually clear.
In order to find the amount of a product made during a double displacement reaction, the product has to be separated from the solution. From this number of moles of precipitate can be calculated. From there the number of moles of reactants can be calculated using the mole ratios of the particular reaction that occurred. As seen in Table 5 it is shown that by finding out the number of moles of the unknown, the molar mass of the unknown can be calculated. From the found mass of the unknown compound, the mound of the original ion can be found.
I don’t agree with the court 's decision about the Monsanto vs. Percy Schmeiser case because of many reasons. First, I think It 's morally wrong to sue somebody for a crop that is not theirs just for patenting. Second, the Monsanto vs. Schmeiser case is an issue of intellectual property rights versus physical property rights. Whether patent rights take priority over the right of the owner of physical property to use his property, to what length can a patent put restrictions on the physical owner of the property as to what they may do with this property, including duplicating or producing it in any way without permission of the patent holder. According to the Center of Food Safety, as of 2005, 186 farmers had paid Monsanto a total of $15
Personally, I believe the “seed police” is simply a distraction to the immorality instances committed by Monsanto. I visualize the “seed police,” like this: a police car pulling 2 cars over at once because they both were traveling above the speed limit. By Monsanto being accused of immoral acts, harming the environment, and causing unknown harm to the human body they carry a load of practicing negative ethics. The fact they would hold farmers accountable for mirroring their practices is like the pot calling the teakettle black. It seems to be more about a dollar then actually spreading advantages of genetically modifying seeds.
If only one reactant is increased, then the chemical reaction will only produce a certain amount of products after the limiting reagent is used up, and in this experiment, the most mass the reaction could produce was 0.4 grams. Although we kept adding calcium chloride, not adding sodium hydroxide in the same proportions will not yield more product, which is the main goal in conducting this lab. We should have seen a plateau at 0.4 grams to show that the limiting reagent inhibited further Ca(OH)2 production, but we made several mistakes in our experiment, which made the data unusable to conclude. Once again, the data is polluted, so these number are not accurate, but it is the data our group has to work with. The theoretical yield should have been more than the actual yield, and the percentages should have been less than 100.
There are many deadly minerals that litter the Earth’s crust, and without proper research and warning innocent victims might fall to lethal toxins from these minerals. One of these minerals, Arsenopyrite, is a vastly spread and highly dangerous arsenic ore, touching Arsenopyrite without protective equipment can cause arsenic poisoning. By carelessly handling the deadly mineral heavier health concerns will appear and slowly manifest itself to something worse. Yet, not all is bad about the natural creation of this mineral, Arsenopyrite can be used to extract arsenic gas which in very acute doses is beneficial to humans. The unsettling nature of this element still exists with its lethal properties and unless given the proper materials to test
To determine the rate of reaction there are many method to be used for example, measuring the mass after the product has been added and measuring the difference in mass on the duration of a digital scale. Another method, which will be used in this experiment is using a gas syringe to measure the volume of the gas which has been produced. The cylinder inside, will be pushed out to show a quantitative presentation of the volume produced by the reaction. Hypothesis
In this geography assignment I will be looking at the company called Monsanto regarding its practices surrounding world food production and how it measures up to ethical standards. A broad definition of ethics is about doing the right thing, that is, to be fair and to be just to people who ever they are and where ever they are. And regarding food people should have a right to access food easily and cheaply and that the food itself is not harmful to their health. After all food is about human survival.
Secondly, pros and cons of this phenomenon would be discussed and then more holistic solutions for improving this process would be introduced as a real green revolution. Finally, whole materials would be concluded. Worth to mention that one advantage
Why should the drinking age be 21 years old, I mean are we even that more mature by that age? “When you are 18 you are judged mature enough to vote, hold public office, serve on juries, serve in the military, fly airplanes, sign contracts and so on. Why is drinking a beer an act of greater responsibility and maturity than flying an airplane or serving your country at war?”("National Youth Rights Association." ) When we turn 18, men get drafted into the military or choose to serve on their own. Either way they have to serve their country.
3.1.1 Physical-chemical parameters The temperature of the reactor was stable at about 30 (±5)°C. Immediately after filling the reactor the pH was 5.5 and after one day the pH increased to 6.3 due to the addition of methanogenic leachate of pH 7. Afterwards the pH decreased progressively from 6.2 to 5.5 during the first 200 days. After day 200, pH increased steadily up to 7.3 at day 400 and remained steady until the end of the experiment at day 700. Conductivity increased from 22mS cm-1 to 36mS cm-1 due to the dissolution of salts into the leachate.
The problem of electrochemical method is OH- ions move away from the cathode due to the difference in charge. This condition decrease the productivity of the formation of HA because OH- ions react with H+ to form H2O. In this work, we develop new method electrosynthesis of HA with 2 chambers system. The electrolysis use ion exchange resin to separate the OH- ions and H+ ions formed. The effect of current density to HA product was studied. HA product analysed with XRD.
