Ancient statues matte of marble (a form of calcium carbonate) are damaged by add

Question

Ancient statues matte of marble (a form of calcium carbonate) are damaged by add rain because the reaction between the sulfuric add in the rain and calcium carbonate produces soluble calcium sulfate, which washes away: CaCO_3(s) + H_2SO_4(aq) rightarrow CaSO_4(aq) + CO_2(g) + H_2O(l) Suppose an engineer decides to study the rate of this reaction. She prepares four reaction vessels by adding 165.2 g of solid calcium carbonate and 75. mL of 5.0 M sulfuric add solution to each, and then filling the remainder of the vessel with distilled water. The volume and temperature of each vessel is shown table below. Arrange the reaction vessels in decreasing order of initial rate of reaction. In other words, select a "1" next to the vessel in which the engineer can reasonably except the initial rate of reaction to be highest, a "2" next to the vessel in which the initial rate of reaction would be next highest, and so on.

Explanation / Answer

Solution:- Rate would be directly proportional to the concentration and temperature. As the temperature increases the kinetic energy of the molecules increases and also the effect number of collisions also increases and more and more molecules are converted to the prodcts.

High concentration and temperature are for vessel C. so the rate would also be highest for this. Next it comes vessel D since reactants mixture volume is same for C and D but temperature is high for C.

Volume is same for vessel A and B but temperature is high for B.

So, Highest to lowest initial rates would be...

C (1)

D (2)

B (3)

A (4)

That means the highest to lowest order would be..

C > D > B >A

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