Ancient statues made of marble (a form of calcium carbonate) are damaged by acid

Question

Ancient statues made of marble (a form of calcium carbonate) are damaged by acid rain because the reaction between the sulfuric acid 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(I). 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 acid solution to each, and then filling the remainder of the vessel with distilled water. The volume and temperature of each vessel is shown in the 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 expect 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

The rate of reaction depends upon the concentration of reactant taken.

Concentration = Moles / Volume

The moles are equal so concentration will be affected by volume.

Again if volumes are same then the rate of reaction will depend upon temperature, higher the temperature higher the rate of reaction .

So the arrangement will be

1 -B

2-A

3-C

4-D

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