Question:

A sample of 4.2 g of copper (II) sulphate pentahydrate is

Last updated: 8/5/2022

A sample of 4.2 g of copper (II) sulphate pentahydrate is

A sample of 4.2 g of copper (II) sulphate pentahydrate is dissolved and made up to 500 cm³. A 50 cm³ portion is added to an excess of Kl. The iodine formed required 18 cm³ of a 0.0950 mol dm-3 solution of sodium thiosulphate for reduction. Identify the correct statement(s) (A) 1 Mole of Cu(II) consume 2 moles of Kl in the given procedure (B) Percentage of Cu in the given sample is 26% (approximately) (C) Mass of Cu in whole solution is 1.09 g (approximately) (D) Reaction of Cu²+ with Kl result into the formation of metallic copper and I