What type of buffer would be needed if a buffer is primarily used for work with acids?

Question

Question

science chemistry

Answer 1

Answer #1

IF we wish to maintain a pH of solution in acidic range then we will take an acid buffer

The acid buffer is a mixture of weak acid and its salt with strong base.

For example

CH3COOH + CH3COONa

this weak acid will dissociate very less in the solution

the salt will dissociate completely

the pH of a buffer solution is calculated using Henderson Hassalbalch's equation

pH = pKa + log [salt] / [acid]

thus with the ratio of salt and acid concentration we can maintain the pH of desired acidic range

the exact pH of solution will depend upon the combination we have taken

the pH of a buffer varies in the range of pKa of acid

For acetate buffer, pKa =4.74 (less than seven ,so can be used in acidic conditions)

Answer 2

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