Question 1
Calculate the pH of a buffer solution prepared by dissolving 0.2 mole of sodium cyanate (NaCNO) and 1.0 mole of cyanic acid (HCNO) in enough water to make 1.0 liter of solution. [K
a(HCNO) = 2.0 × 10
–4]
◦ 0
◦ 3.0
◦ 3.7
◦ 4.4
◦ 5.0
Question 2
Calculate the pH of a buffer solution prepared by dissolving 0.20 mole of cyanic acid (HCNO) and 0.80 mole of sodium cyanate (NaCNO) in enough water to make 1.0 liter of solution.
[K
a(HCNO) = 2.0 × 10
–4]
◦ 0.97
◦ 3.10
◦ 4.40
◦ 3.70
◦ 4.30