what are the formulas to find out pH of solutions with different combinations of weak/strong acid/base

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Q. Choose the correct from the following:
(i) Salt of a strong acid and a strong base are neutral with pH value of 7.
(ii) Salt of a strong acid and a weak base are basic with pH value more than 7.
(iii) SaIt of a weak acid and a strong base are acidic with pH value less than 7.

Q. Acetic acid is a weak acid. If equal volumes of equal molar solutions (with a strong base) are mixed, the

p H

of a solution will be:

p H

of a salt of strong base with weak acid

Q. The pH of a solution of weak base at neutralisation with strong acid is 8.

K_{b}

for the base is

What can a universal indicator indicate?
(i) Whether a solution is acidic.
(ii) Whether a solution is basic.
(iii) The pH of the solution.
(iv) Whether a base is strong or weak.
(v) Whether an acid is strong or weak.

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