Question 1
From the data for the calcium carbonate lumps and powder, in which case is the rate of reaction greater?
The right answer is the one marked above.
In the case of the powder. In the first minute alone 3.1 g of the powder has been used up against only 2.1 g of the lumps.
On the graph this shows up as the steeper slope of the powder curve. The powder curve also reaches 4.8 g at minute 6, while the lumps take until minute 10.