Interpretation : The pH of the solution is to be calculated.
Concept Introduction : The negative logarithm of the concentration of hydrogen ions is the pH of a solution. The formula to calculate pH is given as
pOH stands for the potential of hydroxide ions. It measures the acidity or basicity of any solution. The pOH range lies between 0-14. pOH is calculated by the formula:
Answer to Problem 109A
The pH of the solution is
Explanation of Solution
The concentration of sodium cyanide is
The base dissociation constant is
The reaction between sodium cyanide and water gives sodium hydroxide and hydrogen cyanide.
The concentration of
The concentration of
The formula of the base dissociation constant is given as
Rearrange the above equation to isolate the term
To calculate the value of
So, the concentration of
pOH stands for the potential of hydroxide ions. pOH is calculated by the formula:
To calculate the pOH, substitute the values in above formula:
The formula of pH is given as
Chapter 19 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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