Tutored Practice Problem 4.5.8 Use a primary standard to determine an unknown co

Question

Tutored Practice Problem 4.5.8 Use a primary standard to determine an unknown concentration using an acid-base titration. Close Problem Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unwieldy formula of KHCH404 This is often written in shorthand notation as KHP If 32.59 mL of a potassium hydroxide solution are needed to neutralize 1.589 grams of KHP what is the concentration (mol/L) of the potassium hydroxide solution? Show Approach MacBook Ai

Explanation / Answer

1 mol KHP = 1 mol KOH

No of mol of KHP = w/M =1.589/71.1 = 0.0223 mol

No of mol of KOH = 0.0223 mol

concentration of KOH = n/v = 0.0223/(32.59*10^-3)

                 = 0.684 M

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