Suppose that a student performing this experiment recorded the concentration of NaOH solution as 0.513 M, instead of the correct value of 0.531 M. Assuming there were no other errors, would each of the following experimental results be high, low, or unaffected by the error? Explain your answer. Start your answer with the word "high", "low" or "unaffected" and then provide your explanation. a. equivalent mass of the unknown acid b)pKa of the unknown acid

Answer 1

It is odd for the question to ask about equivalent weight but use M instead of N. The following equation uses N but how it affects the problem will still come out right.
mL x N x mew = grams.
mew = grams/(mL x N)
So if gram is ok and mL is OK, how will putting too large a number in the denominator affect the answer?

I don't know enough about how you performed the experiment to answer the second part.