Question

Which pair of reagents are most
suitable for the laboratory preparation
of copper(II) chloride?
A.aqueous copper(II) nitrate and aqueous
sodium chloride
B.copper and chlorine
C.copper and dilute hydrochloric acid
D.copper(ll) oxide and dilute hydrochloric
Acid ption 1

Answer 1

Answer:

Method

Pour 25 cm3 of sulfuric acid into a beaker.

Add in excess copper(II) oxide.

Heat the beaker and stir until reaction is complete.

Filter off the unreacted solid, collecting the clear blue solution in an evaporating dish.

Boil the solution for 2–3 minutes.

Let the solution cool and watch the crystals grow.