5 An excess of copper(II) oxide is mixed with 40.0 cm³ of 2.50 mol dm-³ hydrochloric acid.
CuO(s) + 2HCl(aq) → CuCl₂(aq) + H₂O(1)
(a) If the mass of copper(II) chloride produced is 5.50 g, what is the percentage yield
of copper(II) chloride?
[Molar mass of copper(II) chloride = 134.4 g mol-¹]
A 81.8%
B 67.2%
☐C 40.9%
☐D 20.4%
(
