Investigation: How does channging the concentration of a substance affect the rate of reaction?

A chemical reaction is the process by which atoms or groups of atoms are redistributed, resulting in a change in the molecular composition of substances.
The reaction rate is how quickly a reaction occurs. I will be using the reaction rate during my investigation to see how the concentration of acid effects the reaction rate. To do this I will be using the following reaction
Hydrochloric + Calcium <Tab/>Ü<Tab/>Calcium + Carbon + <Tab/><Tab/>Water<Tab/>
Acid<Tab/><Tab/> Carbo…