Errors occurring during experimental titration cause errors in the final answer.

Question

Errors occurring during experimental titration cause errors in the final answer. A student pipet 20.00mL of vinegar into the Erlenmeyer flask and then adds 15 mL extra water to the vinegar sample. What effect does this have on the calculated concentration of acetic acid in the vinegar? The calculated concentration is higher than the actual real concentration. The calculated concentration is lower than the actual real concentration. The calculated concentration is accurate. The calculated concentration cannot be determined.

Explanation / Answer

In titration we equate number of moles of acid present and number of moles of base present at equivalence point.

M1 * V1 = M2 * V2

Adding water will not have any effect on number of moles of either acid or base present in the solution.

Answer

The calculated concentration is accurate.

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