Resultant molarity of H+ ion in a mixture of 100 mL of 0.1 M H2SO4 and 200 mL of 0.1 M H3PO3 is:

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0.1 M

0.2 M

0.267 M

0.133 M

answer is B.

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Detailed Solution

H+in H2SO4− a dibasic acid =0.2MH+in H3PO3− a dibasic acid =0.2M. Total H+=M1V1+M2V2V1+V2=100×0.2+200×0.2300=0.2M

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