CHEMISTRY · Subjective · A Level · Chemistry · Acids and bases · Acids and bases
Problem
Methylamine (CH3NH2) has Kb=4.4×10−4. In a 0.020 M aqueous solution at 25 °C, calculate [OH−] using (a) the small-x approximation and (b) the exact quadratic solution. Determine the percent error between the two values and state whether the approximation is acceptable.