Name any two aqueous solutions that, when combined, give a precipitate of barium sulfate.
Describe how a pure sample of barium sulfate can be obtained from the mixed aqueous solutions in (a)(i).
Write the ionic equation for the precipitation reaction that forms barium sulfate, and include state symbols.
Name the dilute acid and one other reagent that react together to form copper(II) sulfate.
Describe a test for oxygen and state the observation.
Complete the equation for the thermal decomposition of hydrated copper(II) nitrate. $2\text{Cu(NO}_3\text{)}_2\cdot3\text{H}_2\text{O} \rightarrow \ldots\text{CuO} + \ldots\text{NO}_2 + \text{O}_2 + \ldots\text{H}_2\text{O}$
State why the student repeats heating and weighing until the mass stays constant.
Work out the value of $x$ by finding the number of moles of ZnSO₄ remaining, the mass of H₂O given off, the number of moles of H₂O given off, and then the value of $x$.