Question

An investigator conducted two experiments to study the factors affecting the rate of a chemical reaction between zinc metal ($\text{Zn}$) and hydrochloric acid ($\text{HCl}$).

In Experiment 1, the investigator added $1.0\text{ g}$ of zinc powder to $50\text{ mL}$ of $1.0\text{ M}$ $\text{HCl}$ solution in a beaker. The reaction was carried out at different temperatures ($20^\circ\text{C}$, $30^\circ\text{C}$, $40^\circ\text{C}$, and $50^\circ\text{C}$), and the time required for the zinc to completely dissolve was recorded for each trial.

In Experiment 2, the investigator added $1.0\text{ g}$ of zinc powder to $50\text{ mL}$ of $\text{HCl}$ solution of different concentrations ($0.5\text{ M}$, $1.0\text{ M}$, $1.5\text{ M}$, and $2.0\text{ M}$) in a beaker. The reaction was carried out at a constant temperature of $20^\circ\text{C}$, and the time required for the zinc to completely dissolve was recorded for each trial.

Based on the descriptions of these experimental designs, is the statement that 'the temperature of the reaction was varied in Experiment 1 but was kept constant in Experiment 2' true or false?