JAMB - Chemistry (2017 - No. 31)
The diagram above. Y is
fused CaO
H2O
NaOH
Concentrated H2SO4
Selitys
In the preparation of sulphur dioxide by the action of dilute acids on sulphates and bisulphites. conc H2SO4 helps to release SO2 from the mixture.
The setup represents the production of sulphur dioxide
The setup represents the production of sulphur dioxide