A salt solution shows pH 9. It is more likely formed from what?
Answer and explanation
Correct answer: Weak acid and strong base
Since pH 9 is greater than 7, the salt solution is basic. A salt formed from a weak acid and a strong base has an anion that reacts with water to produce
OH^-
ions, making the solution basic. A salt of a strong acid and weak base is generally acidic, while one from a strong acid and strong base is approximately neutral. Exam tip: For pH > 7, usually identify a salt of a weak acid and a strong base.
Frequently asked questions
What is the correct answer to this question?
Weak acid and strong base
Why is this the correct answer?
Since pH 9 is greater than 7, the salt solution is basic. A salt formed from a weak acid and a strong base has an anion that reacts with water to produce
OH^-
ions, making the solution basic. A salt of a strong acid and weak base is generally acidic, while one from a strong acid and strong base is approximately neutral. Exam tip: For pH > 7, usually identify a salt of a weak acid and a strong base.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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