Chapter 18.5, Problem 18.7AFP

Interpretation Introduction

Interpretation: Given the value of ${\text{K}}_{\text{a}}$ , $\text{[H}\text{O}{}^{{}^{\text{+}}}\text{]}$ has to be found out. From the concentration of $\text{[H}\text{O}{}^{\text{+}}\text{]}$ the nature of the solution, acidic basic or neutral has to identified.

Concept introduction: $\text{HOCN}$ will dissociate very little because $\text{HOCN}$ has small value of ${\text{K}}_a$. The pH scale will range from 1-14. pH is the negative logarithm of hydrogen ion concentration. If pH is greater than 7 then the solution is basic, less than 7 then the solution is acidic and if it equal to 7 the solution will be neutral. pH and pOH are related by the equation:

pH + pOH =14