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Question

Buffer Solution is prepared by mixing _________________.
  1. Weak acid and its salt of strong base
  2. Strong acid + its salt of strong base
  3. Weak acid + its salt of weak base
  4. Strong base + its salts of strong acid

A
Weak acid and its salt of strong base
B
Strong acid + its salt of strong base
C
Weak acid + its salt of weak base
D
Strong base + its salts of strong acid
Solution
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A solution that resists change in pH value upon addition of a small amount of strong acid or base (less than 1 %) or when the solution is diluted is called buffer solution.
An acidic buffer solution consists of a solution of a weak acid and its salt with a strong base. while basic buffer solution consists of a mixture of a weak base and its salt with strong acid.

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