Chapter 9, Problem 9.54EP

For each of the changes listed will the rate of the following chemical reaction increase, decrease, or remain the same?

$\text{Fe}(s)+2\text{HCl}(aq)\to {\text{FeCl}}_2(aq)+{\text{H}}_2(g)$

1. a. the concentration of HCl is decreased
2. b. the iron is ground into a powder
3. c. a catalyst is added to the reaction mixture
4. d. the temperature of the solution is decreased