2. How would the calculated value of the molar mass of the unknown acid be affec

Question

2. How would the calculated value of the molar mass of the unknown acid be affected (higher, lower, or no change) if the following errors occurred? Briefly explain why in each case. The pH meter was incorrectly calibrated to read lower than the actual pH. During the titration, several drops of NaOH missed the reaction beaker and fell onto the bench top. When determining the dissociation constant for the unknown acid, the solution was actually 3.0 grams of acid per 1.5 liters a. b. c. instead of 3.0 grams per liter as reported

Explanation / Answer

answer:

a. If the pH meter was incorrectly calibrated to read lower than the actual pH, then the unknown acid would be thought to be stronger than it actually was. that means of value H+ is high, so molar mass of acid will also higher.

concentration of acid = concentration of H+

b.he result of this error would be that the unknown acid required more NaOH to titrate it than it actually did. This would indicate a higher concentration of acid than is actually present. so does higher molar mass.

c. does not affect the molar mass of unknown acid.

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