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Three drops of a 1.0 mol dm^-3 solution of HCl was...

Three drops of a 1.0 mol dm^-3 solution of HCl was added to 20 cm³ of a solution of pH6.4. The pH of the resulting solution will be

A.

close to that of pure water

B.

less than 6.4

C.

greater than 6.4

D.

unaltered

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Correct answer is B

No explanation has been provided for this answer.

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