Addition of water to X solution will not change concentration of H3O+. X is:
A
chemical pH indicator
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B
acid/base buffer
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C
anhydrous solution
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D
hypotonic solution
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E
supersaturated solution
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Solution
The correct option is B acid/base buffer Addition of water to X solution does not change the pH of the solution, which means the concentration of the species present changes in such a way that the pH remains the same. This is possible for acid/base buffer.
pH=pka+log[salt][acid]
Since the volume changes the same for both salt and acid, the ratio [salt][acid] remains the same and hence pH also remains the same. Same in the case of basic buffer solution.