Question
Download Solution PDFWhat is the pH of salt containing a mixture of a strong base and a weak acid?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is pH more than 7.
Key Points
- The cations of strong acids do not hydrolyze and therefore the solutions of salts formed by strong acids and strong bases are neutral, i.e. their pH is 7, whereas the solutions of salts formed by strong bases and weak acids are alkaline, i.e. their pH>7.
- Salts that are from strong bases and weak acids do hydrolyze, which gives them a pH greater than 7.
- The pH value range of a weak base is 7.1 to 10 whereas a strong base is 10.1 to 14.
- All substances can be classified as neutral (with a pH of about 7), basic (pH greater than 7), or acidic (pH less than 7), and the pH tells us how strong or weak that substance is as well. For example, a substance with pH = 8 is a very weak base, but a substance with pH = 3 is a strong acid.
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