(a)[6]
State the formulae of the barium compounds R to W.
(b(i))[4]
Write balanced equations for the reactions below. compound T to compound W the roasting of V in air
(b(ii))[4]
Suggest a gaseous reagent for converting T into V, and write a balanced equation for the reaction.
(c)[1]
Suggest the formula of an aqueous reagent, other than an acid, that could be used for reaction 1.
(d(i))[2]
When barium is heated strongly in oxygen, oxide X forms. Oxide X contains 18.9% oxygen by mass. Calculate the empirical formula of X.
(d(ii))[1]
Suggest the identity of the solid Y.
(d(iii))[4]
Use your answers to (i) and (ii) to build an equation for the reaction of X with $\text{H}_2\text{SO}_4$.