Chemistry – Chemical reactions - Rate of reaction | e-Consult

a) The trend shown in the table is that as the concentration of catalyst increases, the volume of ammonia produced per minute also increases. This indicates that the rate of reaction increases with increasing catalyst concentration.

b) The rate of reaction is directly proportional to the volume of ammonia produced per minute. Therefore, the rate of reaction is simply the volume of ammonia produced per minute. No calculation is needed as the data is already provided.

c) A graph of rate of reaction against catalyst concentration would be expected to be a straight line with a positive gradient. This is because as the catalyst concentration increases, the rate of reaction increases linearly.

d) The conclusion is that increasing the catalyst concentration increases the rate of reaction. This is because the catalyst provides an alternative reaction pathway with a lower activation energy, allowing more reactant molecules to react per unit time. Increasing the catalyst concentration provides more active sites, leading to a faster rate of reaction.