Balancing Chemical Equation

  • Thread starter jessica.so
  • Start date
  • #1
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Homework Statement


Copper (II) Chloride dihydrate is mixed with solid aluminum. Find the products and balance the equation.


Homework Equations


N/A


The Attempt at a Solution


The original equation that I got was:
CuCl2 ∙ 2H2O + Al --> AlCl3 + Cu + H2O
When I balanced it, I got:
3 CuCl2 ∙ 2H2O + 2 Al --> 2 AlCl3 + 3 Cu + 2 H2O
but I'm unsure about that. I am just wondering if the H2O at the end of the equation should have a coefficient of 6 because 3 [CuCl2 ∙ 2 H2O] were needed. So then the equation would be:
3 CuCl2 ∙ 2H2O + 2 Al --> 2 AlCl3 + 3 Cu + 6 H2O instead?
I do not know which one is correct. Please help me!
 

Answers and Replies

  • #2
Borek
Mentor
28,888
3,432
Should be 6.

Note that CuCl2.2H2O is equivalent to CuCl2(H2O)2 or even CuCl2H4O2.
 
  • #3
20
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Ohh OKAY! Thanks so much!!
 

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