(b) These are Jay's results.

Concentration of acid in mol/dm³

0.1 0.1 0.5 0.5 1.0 1.0 2.0 2.0

Time taken to collect 10 cm³ gas in s

50 35 25 18 7 7 7 7

Catalyst used

no catalyst catalyst no catalyst catalyst no catalyst catalyst no catalyst catalyst

What conclusions can you make from the data? Use values from the data to support your answer.​