hydrochloric acid and marble reactions

dgfhhdhdInvestigating rates of reaction

AIM
The aim of my investigation is to find out how rates of reaction are affected by temperature, specifically how the rate of the reaction between hydrochloric acid and marble chips is affected by the temperature of the hydrochloric acid.

VARIABLES
The variables in this experiment are:
· The mass of the marble chips
· The size of the marble chips
· The amount of hydrochloric acid used
· The concentration of hydrochloric acid used
· The temperature of the hydrochloric acid
· The speed at which CO2 is produced
· Equipment used

My input variable is the temperature of the hydrochloric acid. I have chosen this because, according to the kinetic theory, the temperature should increase the speed and energy of the particles, therefore there are more collisions between particles, and the rate of reaction increases.

My output variable is the speed at which CO2 is produced. I have...