Chemistry
The following questions relate to mole concept.
(a) the volume of 320 g of SO2 at STP.
(Atomic mass of S = 32 and O = 16)
(b) the mass of 1022 atoms of sulphur.
[Atomic mass : S = 32 and O = 16, Avogadro's number (NA) = 6.022 x 1023]
Related Questions
State one relevant observation for each of the the following reactions.
(a) When hydrogen chloride gas is passed through a solution of sodium thiosulphate.
(b) Concentrated sulphuric acid is added to a solution of potassium nitrate.
(c) When fused lead bromide is electrolysed.
Give balanced chemical equations for the following.
(a) Calcium bicarbonate reacts with dilute hydrochloric acid.
(b) Ferric hydroxide with nitric acid.
(c) Zinc nitrate with ammonium hydroxide
For each of the substances given below, what is the role played in extraction of ZnO and Al respectively.
(a) Coke
(b) Cryolite
The following questions are pertaining to the laboratory preparation of hydrochloric acid.
(a) Name the reactants used during the laboratory preparation of hydrochloric acid.
(b) Give suitable reason for choosing the reactants for laboratory preparation.
(c) Write balanced chemical equation for the reaction taking place below 200°C.