Analysis and conclusion help

1. The reason for the ice cold rinsing of the pellet is simple. How does temperature affect solubility? I will give you part “b” Acetone acts as drying agent removing water.

2. A. Like in the prelab question what would happen to the sulfate precipitate if you did not use enough barium chloride?

B. If you did not thoroughly dry the sample how would it affect your calculated mass of reactants if the moles of sulfate predicate is inflated?

C. I will give you this one. When you put a hot object on the scale they appear ligher because of convection currents but it is very minor.

3. I will give you the reactant you predict the products and balance

a. H⁺(aq) + CO₃^2- →

4. How would omitting the acid step affect the sulfate percentage? As like water if there is more in the precipitate than sulfate you will have an inflated number of moles of sulfate. How would this affect the mass of the reactant calculated?

5. For error analysis, just explain where you may have gone wrong in the measurements in the lab. Let’s assume that all your calculations are correct.