Micro-Reactions: Predicting the Products of Double Replacement Reactions

And finally into test tube 3, I pipetted 1.0 ml turnip extract and 4.0 ml of water. The contents of test tube 1 was poured into a spectrometer tube and labeled it “B” for blank. “B” tube was now inserted it into the spectrometer. An adjustment to the control knob was made to zero the absorbance reading on the spectrometer since one cannot continue the experiment if the spectrometer is not zeroed. A combination of two people and a stop watch was now needed to not only record the time of the reaction, but to mix the reagents in a precise and accurate manner. As my partner recorded the time, I quickly poured tube 3 into tube 2. I then poured tube 2 into the experiment spectrometer tube labeled “E” and inserted it into the spectrometer. A partner then recorded the absorbance reading for every 20 seconds for a total of 120 seconds. After the experiment, a brown color in the tube should be observed to indicate the reaction was carried out. Using sterile techniques, any excess liquid left was disposed

3. Carefully felt the sides of the test tube and observed the resulted chemical reaction for about 30 seconds.

The purpose of this particular lab was to experiment and identify the chemical and physical changes throughout the experiment.

There are four major systematic errors in the laboratory, which are the fact that some of the Alka-Seltzer pills were chipped, some of the water splashed out of the beaker, we didn’t know when the reaction was actually finished, and the mass of the Alka-Seltzer might have been different.

What are two possible sources of error for this experiment? Discuss how these errors would have changed your results. Specifically, how would the ratio of moles of anhydride to moles of water have changed?

In conclusion, this lab was a failure. Not only was the yield very small upon inspection, but the product’s composition was unknown due to the unknown solution. Given the nature of the lab, little yield was expected and observed, making the lab itself very particular in nature. Add to this the addition of the unknown solution and any produce was astounding. Not only unfortunate, the unknown solution was very dangerous. If it had been some solution that reacted violently with the reagents, there could have been unforeseen damage done to the lab and the individuals

3.What was your prediction about the results of each factor tested in your two lab procedures? Explain your predictions based on your knowledge of the dissolving process, collision theory, and reaction rates.

Difficulties in the experiment arose when inverting the buret and completely submerging it into the beaker of water. This is a likely place for error because

Purpose: The purpose of this experiment is to observe a variety of chemical reactions and to identify patterns in the conversion of reactants into products.

Which of the following conclusions is most valid, given the results of experiment 1? 6-8.2

This experiment is based on the concept of performing SN2 reactions and analyzing how different factors affect said reactions. The factors in question for this experiment are steric hindrance, nucleophilicity, and nature of the leaving group. An SN2 reaction is a type of substitution reaction. A substitution reaction entails an alkyl having its leaving group (typically a halogen) replaced by a different atom. A nucleophilic substitution involves a nucleophile attacking a leaving group on a carbon atom. The nucleophile utilizes its lone pair of electrons to form a new bond with the carbon atom. There are two different types of substitution reactions. There are SN1 reactions (first order) and SN2 reactions (second order) (Weldegerima 2016). SN1 reactions are unimolecular and involve two separate steps. One of the two steps takes longer than the other and is called the rate limiting step. SN1 reactions tend to favor tertiary alkyl halides. SN2 reactions involve a strong nucleophile interacting with an electrophile carbon and making the leaving group detach from the

The start of the experiment consisted of filling up four beakers with de-ionized water to 150 ml. After the beakers were filled to the appropriate amounts they were then labeled with the

What does this experiment have to do with chemistry anyway? Explain in a paragraph or two.

Double replacement reaction is switching two compositions with the components. An example would be AB + CD ---> AD + CB (B and D switched places). This reaction is paired unlike single replacement so that is how you can tell the difference between both those reactions (really easy). Redox reaction is an electric reaction. Redox is a combination of the word reduction and oxidation (first two letters of the word). Reduction gains more and more electrons, on the other hand, oxidation is more loosing the electrons. The electrons are within the species and an example of this type of chemical reaction will be oxidised. Last but not least... The acid base reaction is when an acid and base are placed well-balanced they acknowledge to neutralize the acid and base belongings generating a salt. The acid is a anion and the base is a cation and that is called SALT. An example of Acid base chemical reaction would be HCl + NaOH ---> NaCl + H2O. It is useful to be familiar with chemical reactions because without it you would not be alive right now. What I mean by that is that chemicals collaborate with eachother and it creates energy and

In the following experiment six solutions were mixed with each other (groups of twos) in test tubes to test which reaction will result in an insoluble solid. See method for more detail.