Rates of reaction data analysis question

At lower concentrations (from 0.1 to 1.0) the concentration the time taken to collect 10cm³ of gas.

At concentrations of 0.1 to 0.5 adding a catalyst the time taken to collect 10cm³ of gas.

At concentrations of 1.0 and 2.0 adding a catalyst change the time taken to collect 10cm³ of gas.

Higher concentrations will the time taken to collect 10cm³ of gas unless there is already an excess of hydrogen ions around the zinc pieces.

At high concentrations a catalyst is not needed as there are already enough hydrogen ion particles with enough energy to exceed the energy.