A chemist wants to measure the rate of the following reaction: 2ClO2 (aq) + 2OH- (aq) ----> ClO3 - (aq) + ClO2 (aq) + H2

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A chemist wants to measure the rate of the following reaction:
2ClO2 (aq) + 2OH- (aq) ----> ClO3 - (aq) + ClO2 (aq) + H2O
(l)
a. Will the concentration of OHincrease, decrease, or stay the
same as time goes on?
b. Will the rate of the reaction increase, decrease, or stay the
same as time goes on?
The chemist mentioned in the problem measures the rate
of the same reaction, but this time she uses a higher concentration
of ClO2 but the same concentration of OH- . She notices a change in
the reaction rate. Is the reaction faster or slower this time?
The chemist mentioned in the problem measures the rate of
the same reaction with the same concentration of reactants, but
this time she does so at a lower temperature. Is the reaction
faster or slower this time?