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Which statement is correct when an acidic solution is diluted with water?

Answer and explanation

Correct answer: Hydrogen ions per unit volume decrease and pH increases

Dilution increases the volume while the amount of dissolved acid remains the same. Consequently, the concentration of hydrogen ions, written as [H+], decreases. Since pH is related to concentration by pH = −log[H+], a decrease in [H+] produces an increase in pH. The solution becomes less acidic, but it does not necessarily become basic. Thus A is correct; B reverses the effect and C and D are false.

Related tags

DilutionPhAcid ConcentrationAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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