The molar ratio of cucl2 to Al should be

1) The chemical equation is:

Al +  CuCl2 ---> Cu + AlCl3

2) You have to balance the equation to state the coefficients:

2Al + 3CuCl2 ---> 3Cu + 2Al Cl3

3) Now the coefficients tell you the molar ratios.

2 mol Al : 3 mol CuCl2 : 3 mol Cu : 2 mol AlCl3

4) The molar ratio of CuCl2 to Al is:

3 mol Cu Cl2 / 2 mol Al = 3/2 = 1.5

Explanation:

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