one question with 4 options which of the following is a good buffer system?SHUSH) SSOLUTIOa.solution with 0,10M NaCl and 0.10MHCIb, solution with 0.10M HCN and 0.10 M HNO 3C. solution with 0,10M NADH and 0.10 M HND12d. Solution with 0.10M HNO₂ and 0.10 M NaNO₂200310 29 Dipped Balognko0908brown SREDSWE25i 2000 pr000000 200

It is based on the concept of buffer. Here we are required to find the solution which can form good buffer system. Buffer solution are solution which can resist the change in pH of the solution when acid or Base are added to it externally. There are two type of Buffer solution A) acidic buffer: This buffer solution are prepared by mixing weak acid and salt of its conjugate Base with strong Base. B) basic buffer: This buffer solution are prepared by mixing weak base and salt of its conjugate acid and strong acid. The pH of the buffer solution is given by Henderson equation. Acid are compound which releases hydrogen ion when dissolve in water. There are two type of acid A) Strong acid: This are acid which dissociate completely to furnish hydrogen ion when dissolve in water. B) weak acid: This are acid dissociate partially to furnish hydrogen ion when dissolve in water. Bases are compound which releases hydroxide ion when dissolve in water. There are two type of bases A) Strong base : This are bases which dissociate completely to furnish hydroxide ion when dissolve in water. B) Weak bases : This are bases which does not dissociate completely to furnish hydroxide ion. Given A) A solution of 0.1M NaCl and 0.1 M HCl This does not form buffer because HCl is a strong acid and NaCl is a salt of strong Base NaOH and strong acid HCl. B) A solution of 0.1M HCN and 0.1M HNO3 This does not form buffer because HCN is a weak acid but nitric acid is Strong acid which dissociate completely to furnish hydrogen ion and no salt of conjugate Base and strong Base is possible C) A solution of 0.1M NaOH and 0.1M HNO3 This does not form buffer solution because nitric acid is a strong acid and NaOH is a strong Base so they undergo Neutralization reaction to form Salt and water. D) A solution of 0.1M HNO2 and 0.1M NaNO2 This will form buffer solution because HNO2 is a weak acid and NaNO2 is a salt of strong Base NaOH and the conjugate Base of weak acid (NO2- ).Conclusion The solution which can form good buffer system D) A solution of 0.1M HNO2 and 0.1M NaNO2