Question

2 moles of zinc reacts with a cupric chloride solution containing 6.023x10²² formula units of cucl2 calculate the moles of copper obtained

Answer 1

Given,

2 moles of zinc reacts with a cupric chloride solution containing 6.023×10^22 formula untis of CuCl2.

To calculate:The moles of copper obtained.

Chemical Equation :

Zn+CuCl2 -------------> ZnCl2+Cu

If one mole of Zn react with one mole of CuCl2 it gives one mole of ZnCl2 and one mole of Cu.

If two moles of Zn react with 6.023×10^22 particles of CuCl2 then how many moles of Cu it gives?

1 mole of CuCl2 = 6.023×10^23 formula units.

Number of moles present 6.022×10^23 formula units of CuCl2= 6.022×10^22/6.022×10^23 = 1/10 = 0.1

1 mole of CuCl2 _____ 1 mole Cu

0.1 mole of CuCl2 _____ ?

= 0.1×1/1 = 0.1 moles of Cu

Therefore the number of moles of copper obtained is 0.1.