3,980 2. Suppose that a student doing this experiment failed to dry the KHP befo

Question

3,980 2. Suppose that a student doing this experiment failed to dry the KHP before using it to standardize the NaOH solution. (a) Would her calculated molarity of the NaOH solution probably be too high or too low2 Briefly L explain. acid? Briefly explain. explain. (b) How would the error you described in (a) affect the calculated equivalent mass of the unknown (c) How would the error you described in (a) affect the calculated K, of the unknown acid? Briefly mol The calculated molaritg of aoH woud be too was dry KHp. QL, 125 nnoles of oisis not eses to calaulade ta

Explanation / Answer

(a) if the sample is wet, amount weighed would be less than the required amount of KHP

Thus no of moles of NaOH required to neutralize will be low

(b) The mass of acid obtained from data will be lower than the original,

As no of moles = mass of acid/molar mass

(c) Ka is determined using half-way to equivalence point volume of NaOH, thus Ka will not be affected.

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