In which situation will the reaction rate INCREASE? Responses A when a catalyst is addedwhen a catalyst is added B when the temperature dropswhen the temperature drops C when the pressure is loweredwhen the pressure is lowered D when the molecules are large and bulky

1 answer

The reaction rate will increase in the following situation:

A when a catalyst is added.

A catalyst lowers the activation energy needed for a reaction, which increases the rate of the reaction without being consumed in the process.

The other options typically result in a decrease in the reaction rate:

  • B when the temperature drops: Generally, lowering the temperature slows down the reaction rate.
  • C when the pressure is lowered: For reactions involving gases, lowering the pressure often decreases the reaction rate.
  • D when the molecules are large and bulky: Larger molecules may hinder the reaction due to steric effects, potentially slowing down the reaction.

Therefore, option A is the correct choice.