Problem: Novocaine, C13H21O2N2Cl, 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 [H3O+], [OH−], and pH of a 2.0% solution by mass of novocaine, assuming that the density of the solution is 1.0 g/mL.

FREE Expert Solution

(1) Ka of novocaine

Ka= 1x10-147x10-6

Ka = 1.4x10-8


(2) Calculate molarity of novocaine

M = (2 g novocaine100 g solution)(1 mol272.45 g)1 L

M = 0.0734 M


(3) Construct an ICE chart


(4) Calculate x

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Problem Details

Novocaine, C13H21O2N2Cl, 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 [H3O+], [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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