to keep the pH value constante in chemical reaction
to increase the pH value in chemical reaction
to increase or decrease the pH value of according the need
A
to keep the pH value constante in chemical reaction
B
to increase the pH value in chemical reaction
C
to decrease the pH value on chemical reaction
D
to increase or decrease the pH value of according the need
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Solution
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A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. Its pH changes very little when a small or moderate amount of strong acid or base is added to it and thus it is used to prevent changes in the pH of a solution.
So answer is D.
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