Question

In the reaction of Mg (s) + 2 HCl (aq) MgCl2 (aq) + H2 (g), which of the following would decrease the rate of the forward reaction?
Select one:
a. Increasing the mass of magnesium
b. Changing HCl solution from 0.500 moles in 0.5 liters to 0.500 moles in 1.5 liters
c. Decreasing the pressure of the system
d. Increasing the surface area of the magnesium solid