Question

Given the balanced equation representing a reaction:

Zn(s) + 2HCl(aq) - H2(g) + ZnCl2(aq)
Which set of reaction conditions produces H2(g) at the fastest rate?
A.
a 1.0-g lump of Zn(s) in 50. mL of 0.5 M HCl(aq) at 20.°C
B.
a 1.0-g lump of Zn(s) in 50. mL of 0.5 M HCl(aq) at 30.°C
C.
1.0 g of powdered Zn(s) in 50. mL of 1.0 M HCl(aq) at 20. °C
D
1.0 g of powdered Zn(s) in 50. mL of 1.0 M HCl(aq) at 30.°C

Answer 1

D 1.0 g of powdered Zn(s) in 50. mL of 1.0 M HCl(aq) at 30.°C

Step-by-step explanation:

There are several factors affecting and controlling the rate of chemical reactions.

Some of which are applicable in resolving this problem is the nature of the reactants and their concentration. Also, the temperature of the reaction is also very important.

• Reactants that powdered ensures a faster rate because, more surface area is exposed for the reaction.
• Also, the higher the temperature, the faster the reaction will take place.
• So, the powdered zinc and the higher temperature reaction will facilitate a better rate of reaction.