(a)[1]
Zinc blende is roasted in air. Zinc oxide is one of the products. State the other product formed in this reaction.
(b(i))[2]
Give two reasons why coke is required.
(b(ii))[1]
Write a chemical equation for the formation of zinc in the furnace.
(b(iii))[1]
Explain how this information shows that the zinc made inside the furnace is a gas.
(b(iv))[1]
The gaseous zinc is changed into molten zinc. State the name of this change of state.
(c(i))[1]
Name the residue left in step 2.
(c(ii))[2]
In step 3, a saturated solution is formed. Describe what a saturated solution is.
(c(iii))[2]
Name two compounds, each of which reacts with dilute sulfuric acid to produce aqueous zinc sulfate.
(d(i))[2]
Describe how the student can make sure that all the water has been removed.
(d(ii))[4]
Find the value of $x$ by following the steps below.