Aqueous solution of HNO 3, KOH , CH 3 COOH and CH 3 COONa of identical concentration are provided. The pair (s) of solutions which form a buffer upon mixing is (are)

Question

Aqueous solution of HNO 3, KOH , CH 3 COOH and CH 3 COONa of identical concentration are provided. The pair (s) of solutions which form a buffer upon mixing is (are) (A) HNO 3 and CH 3 COOH (B) KOH and CH 3 COONa (C) HNO 3 and CH 3 COONa (D) CH 3 COOH and CH 3 COONa

Tardigrade Admin · Accepted Answer

• A Weak acid and its salt with a strong base forms a buffer. • HNO 3 being a strong acid, displaces weaker acid CH 3 COOH. HNO 3+ CH 3- COO - leftharpoons CH 3- COOH + NO 3- If [ CH 3 COO -]>[ HNO 3], then solution contains weak acid ( CH 3 COOH ) and its conjugate base ( CH 3 COO -)

Q. Aqueous solution of $H N O_{3}, K O H, C H_{3} COO H$ and $C H_{3} COON a$ of identical concentration are provided. The pair (s) of solutions which form a buffer upon mixing is (are)

$H N O_{3}$ and $C H_{3} COO H$

$K O H$ and $C H_{3} COON a$

$H N O_{3}$ and $C H_{3} COON a$

$C H_{3} COO H$ and $C H_{3} COON a$

Q. Aqueous solution of HNO3​,KOH,CH3​COOH and CH3​COONa of identical concentration are provided. The pair (s) of solutions which form a buffer upon mixing is (are)

HNO3​ and CH3​COOH

KOH and CH3​COONa

HNO3​ and CH3​COONa

CH3​COOH and CH3​COONa

• A Weak acid and its salt with a strong base forms a buffer. • HNO3​ being a strong acid, displaces weaker acid CH3​COOH. HNO3​+CH3​−COO−⇌CH3​−COOH+NO3−​ If [CH3​COO−]>[HNO3​], then solution contains weak acid (CH3​COOH) and its conjugate base (CH3​COO−)

Q. Aqueous solution of $H N O_{3}, K O H, C H_{3} COO H$ and $C H_{3} COON a$ of identical concentration are provided. The pair (s) of solutions which form a buffer upon mixing is (are)

$H N O_{3}$ and $C H_{3} COO H$

$K O H$ and $C H_{3} COON a$

$H N O_{3}$ and $C H_{3} COON a$

$C H_{3} COO H$ and $C H_{3} COON a$