Question

 1. The precipitate was stored for a week and reweighed a week later. The amount of product decreased by 0.03g. Provide an explanation for this.

 2. Other procedures require the use of 0.1 M MgSO₄ - H₂O rather than the 10% (m/m) that we used. What is the molarity of a 10% MgSO₄ - H₂O solution?

 3. List 3 steps in the procedure where loss of product could occur that are not human error.

Answer 1