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Acids, bases and titration — Question 46

Original QCE Vault practice · 5 marks

Q46 · Practice questionComplex familiar5 marks

QUESTION 46 (5 marks)

A vinegar sample is diluted by transferring 10.00 mL to a 100.0 mL volumetric flask. A 20.00 mL aliquot of the dilution requires 16.40 mL of 0.1000 mol L⁻¹ NaOH. Treat all acidity as ethanoic acid; its molar mass is 60.05 g mol⁻¹.

a) Calculate the original acid concentration in mol L⁻¹. [3 marks]

b) Convert the result to grams of ethanoic acid per 100 mL of vinegar. [2 marks]

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