Calculate the pH of buffer solution prepared by dissolving 0.20 mol of sodium cyanate (NaCNO) and 1.0 mol of cynic acid (HCNO) in enough water to make…

Question

Calculate the pH of buffer solution prepared by dissolving 0.20 mol of sodium cyanate (NaCNO) and 1.0 mol of cynic acid (HCNO) in enough water to make 1.0 litre of slution. K_a(HCNO)=2.0×10^(-4).

MARKS Content Team · Accepted Answer

Correct answer: (B) 3.0. pH =-logK_a(HCNO)+log([NaCNO])/([HCNO]) =−log(2.0×10^(−4) )+log(0.20 mol/L)/(1.0 mol/L) =3.7+(-0.67) =3.03≃3.0

Calculate the pH of buffer solution prepared by dissolving 0.20 mol of sodium cyanate (NaCNO) and 1.0 mol of cynic acid (HCNO) in enough water to make 1.0 litre of slution. $K_{a} (H C N O) = 2.0 \times 1 0^{- 4} .$

Solution

More Ionic Equilibrium Questions

Calculate the pH of buffer solution prepared by dissolving 0.20 mol of sodium cyanate (NaCNO) and 1.0 mol of cynic acid (HCNO) in enough water to make 1.0 litre of slution. Ka(HCNO)=2.0×10-4.

Solution

More Ionic Equilibrium Questions

Calculate the pH of buffer solution prepared by dissolving 0.20 mol of sodium cyanate (NaCNO) and 1.0 mol of cynic acid (HCNO) in enough water to make 1.0 litre of slution. $K_{a} (H C N O) = 2.0 \times 1 0^{- 4} .$