Question

A kinetics experiment is set up is set up to collect the gas that is generated when a sample of chalk consisting primarily of solid CaCO3 is added to a solution of ethanoic acid, CH3COOH. The rate of reaction between CaCO3 and CH3COOH is determined by measuring the volume of gas generated at 25 degrees C and 1 atm as a functionof time. Which of the following experimental conditions is most likely to increase gas production?

A) Decreasing the amount of ethnoic acid solution used in the experiment
B) Decreasing the concentration of the ethnoic acid solution used in the experiment
C) Decreasing the temperature at which the experiment is performed
D) Decreasing the partical size of the CaC03 by grinding it into a fine powder

Answer 1

Decreasing the particle size of CaCO3 by grinding it into a fine powder increases the surface area for the reaction, which is the condition most likely to increase the rate of gas production in the reaction with ethanoic acid. Therefore, the correct answer is D.

Step-by-step explanation:

The student's question is about the rate of gas production in the reaction of calcium carbonate (CaCO3) with ethanoic acid (CH3COOH) and which experimental condition would most likely increase this rate. Decreasing the temperature or the concentration of ethanoic acid would not result in increased gas production as these actions typically slow down chemical reactions. Decreasing the amount of ethanoic acid would limit the reactant available, thus not increasing the rate. However, decreasing the particle size of CaCO3 by grinding it into a fine powder would increase the surface area available for reaction, which in turn would increase the rate of the reaction and hence the volume of gas produced. The answer to the student's question is option D: Decreasing the particle size of the CaCO3 by grinding it into a fine powder is most likely to increase gas production.

Answer 2

Correct option -D

Step-by-step explanation:

Here, A kinetics experiment is set up is set up to collect the gas that is generated from the cacarbonate and methanoic acid.

Among the given conditions, decreasing the particle size of calcium carbonate only increases the production of gas.

Smaller particles of reactant increases the surface area then followed by rate of reaction will be increases it leads to increases the production of gas.

Therefore, the suitable experimental condition most likely to increase the gas production is-

Decreasing the particle size of the
`CaCO_(3)` by grinding it into a fine powder.

Hence, correct option -D.