Q. 7.75 - An Introduction to General, Organic, and Biological Chemistry

Question

How would each of the following change the rate of the reaction shown here?

$2{\mathrm{SO}}_2\left(\mathrm{g}\right) + {\mathrm{O}}_2\left(\mathrm{g}\right) \to 2{\mathrm{SO}}_3\left(\mathrm{g}\right)$

a. adding some ${\mathrm{SO}}_2\left(\mathrm{g}\right)$

b. increasing the temperature

c. adding a catalyst

d. removing some ${\mathrm{O}}_2\left(\mathrm{g}\right)$

Step-by-Step Solution

Answer

a. The rate of reaction would increase. 

b. The rate of reaction would increase.  

c. The rate of reaction would increase.  

d. The rate of reaction would decrease.  

Part(a) Step 1: Given information

We have been given a reaction $2{\mathrm{SO}}_2\left(\mathrm{g}\right) + {\mathrm{O}}_2\left(\mathrm{g}\right)\to 2{\mathrm{SO}}_3\left(\mathrm{g}\right)$.

We need to find out what happens to the rate of the reaction on adding some ${\mathrm{SO}}_2\left(\mathrm{g}\right)$

Part(a) Step 2: Explanation

On increasing the concentration of reactant, the rate of reaction increases. Hence on adding more ${\mathrm{SO}}_2\left(\mathrm{g}\right)$ the rate of reaction increases.

Part(b) Step 1: Given information

We have been given a reaction $2{\mathrm{SO}}_2\left(\mathrm{g}\right) + {\mathrm{O}}_2\left(\mathrm{g}\right)\to 2{\mathrm{SO}}_3\left(\mathrm{g}\right)$.

We need to find out what happens to the rate of the reaction on increasing the temperature.

Part(b) Step 2: Explanation

The rate of chemical reaction increments on rising the temperature. Hence the rate of reaction $2{\mathrm{SO}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\to 2{\mathrm{SO}}_3\left(\mathrm{g}\right)$ also increases.

Part(c) Step 1: Given information

We have been given a reaction $2{\mathrm{SO}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\to 2{\mathrm{SO}}_3\left(\mathrm{g}\right)$.

We need to find out what happens to the rate of the reaction on adding a catalyst.

Part(c) Step 2: Explanation

Catalyst influence the rate of reaction positively. So on adding a catalyst rate of reaction increases.

Part(d) Step 1: Given information

We have been given a reaction $2{\mathrm{SO}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\to 2{\mathrm{SO}}_3\left(\mathrm{g}\right)$.

We need to find out what happens to the rate of the reaction on removing some ${\mathrm{O}}_2\left(\mathrm{g}\right)$

Part(d) Step 2: Explanation

On removing ${\mathrm{O}}_2\left(\mathrm{g}\right)$, we will decrease the reactant. Hence, the rate of reaction would decrease.