Verified Solution • 2025–26 Session moderate

QAIPM-2012-Ch-1721: NEET 2012 Chemistry - Class 12 AIPM-2012-Ch-1721 Solution: Buffer solutions have constant acidity and alkalinity because…

Buffer solutions have constant acidity and alkalinity because these give unionised acid or base on reaction with added acid or alkali acids and alkalies in these solutions are shielded from attack by other ions they have large excess of H+H^+ or OH−OH^- ions they have fixed value of pH

Multiple Choice Options

  • A pA+xA(pB−pA){p_A} + {x_A}\left( {{p_B} - {p_A}} \right) p A _ + x A _ ( p B _ _ p A _ )
  • B pA+xA(pA−pB){p_A} + {x_A}\left( {{p_A} - {p_B}} \right) p A _ + x A _ ( p A _ _ p B _ )
  • C pB+xA(pB−pA){p_B} + {x_A}\left( {{p_B} - {p_A}} \right) p B _ + x A _ ( p B _ _ p A _ )
  • D pB+xA(pA−pB){p_B} + {x_A}\left( {{p_A} - {p_B}} \right) p B _ + x A _ ( p A _ _ p B _ )

Step-by-Step Verified Solution

p = p A x A + p B x B = p A x A + p B (1 � x A ) (As for binary solution x A + x B = 1) = p A x A + p B � p B x A = p B + x A (p A � p B )

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