The values in the last column marked time will increase progressively.
What is the rate of reaction?
Now we know that the rate of reaction has to do with how fast or slow that a reaction proceeds. Now the concentration of reactants plays a vital role in the determination of the rate of reaction.
If we look at the table, we will see that the mass of the calcium carbonate remains constant but more water was added to the acid. This decreases the concentration of the acid and as such the reaction will take place more slowly as the concentration of acid decreases.
As such, the values in the last column marked time will increase progressively.
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