(1) Ka of novocaine

$\mathbf{Ka}\mathbf{=}\mathbf{}\frac{\mathbf{1}\mathbf{x}{\mathbf{10}}^{\mathbf{-}\mathbf{14}}}{\mathbf{7}\mathbf{x}{\mathbf{10}}^{\mathbf{-}\mathbf{6}}}$

**Ka = 1.4x10**^{-8}

(2) Calculate molarity of novocaine

$\mathbf{M}\mathbf{}\mathbf{=}\mathbf{}\frac{\left({\displaystyle \frac{2\overline{)g\mathrm{novocaine}}}{100\overline{)g\mathrm{solution}}}}\right)\left({\displaystyle \frac{1\mathrm{mol}}{272.45\overline{)g}}}\right)}{\mathbf{1}\mathbf{}\mathbf{L}}$

M = 0.0734 M

(3) Construct an ICE chart

(4) Calculate x

Novocaine, C_{1}_{3}H_{21}O_{2}N_{2}Cl, is the salt of the base procaine and hydrochloric acid. The ionization constant for procaine is 7 × 10^{−6}. Is a solution of novocaine acidic or basic? What are [H_{3}O^{+}], [OH^{−}], and pH of a 2.0% solution by mass of novocaine, assuming that the density of the solution is 1.0 g/mL.

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