Question

Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory to standardize strong base solutions. It has the unwieldy formula of KHC₈H₄O₄. This is often written in shorthand notation as KHP.

If 1.89 grams of KHP are needed to exactly neutralize 22.0 mL of a sodium hydroxide solution, what is the concentration of the base solution ?

ANSWER: ___M sodium hydroxide

Answer 1

Balanced equation: - KHP+ NAOH → K Nap + H20 Mass of kHP= 1.899. molar muss Of 1<HP=204-229/nal Nermber of mules of KHP= 204.22g|net Normber of moles of KAP= 1.898 -0.009255 mol Foom reaction, 1.Omel of kHP neutodize 1.0 mil of Naot thon 0.009255 mol of KHP well neutralize 0.009255 mol of NaOH. Volerome Of nach Osoletělu = 22:0ml =2204 = 0.0221 Cencantorallen of base (AQOH) Solution D = Nenmber of moles of solute - volume of solution ên litre -0.009255 mol = 0.42 mol/L = 0.42 M -0.0221 LLL IGS Scannedbath CamScanner