14. Solving a chemistry problem

14. Solving a chemistry problem

5. Which of the following solutions are buffered:
a) 0.3M HNO3 0.3M NaNO3;
b) 0.2M HCN 0.4M KCN;
c) 0.03M HCN 3M KCN;
d) 0.1M NaHCO3 0.1M CO2 ?
Calculate the pH of the solution (b).

Additional information:

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