(a(i))[1]
Suggest a reason for the decrease in mass of the reaction mixture as the reaction continues.
(a(ii))[1]
Calculate the mass lost in grams when the reaction is finished.
(a(iii))[2]
On the grid, plot a graph to show how the mass changes with time when dilute hydrochloric acid of twice the concentration is used.
(a(iv))[1]
Fill in the temperatures in the first column.
(b)[3]
The main ore of iron is called [BLANK]. The main impurity in the iron ore is silicon(IV) oxide. Calcium carbonate added to the blast furnace decomposes to form calcium oxide and carbon [BLANK]. The calcium oxide reacts with the silicon(IV) oxide to form [BLANK].