Question

Suppose that the NaOH sitting on the shelf had absorbed 2 g of water for every 1 g of NaOH. How would this have affected your results?

A. The molarity of the NaOH solution would have been double what you expected.

B. The concentration of the NaOH solution would have been different, but the titration results would have been the same.

C. The molarity of the NaOH solution would have been one third what you expected.

D. It would not have affected the concentration of the NaOH solution nor the results of the titrations.

Answer 1

Molality is the number of moles of solute dissolved per 1000 g of the solvent. As the NaOH absorbed 2 g of water for every 1 g of NaOH. The actual weight of NaOH will one-third of the expected value. Hence the number of moles will also one-third of the expected value. So,

C. The molarity of the NaOH solution would have been one-third what you expected.