Question

Which is the correct mole ratio for aluminum chloride to chlorine in the chemical reaction alcl3 br2 ? albr3 cl2?

Answer 1

Answer : The mole ratio for aluminium chloride to chlorine is, 2 : 3

Explanation :

The given unbalanced chemical reaction is :

`AlCl_3+Br_2\rightarrow AlBr_3+Cl_2`

First we have to balance the chemical reaction.

In order to balance the chemical reaction, the coefficient 2 is put before
`AlCl_3\text{ and }AlBr_3` and the coefficient 3 is put before
`Cl_2\text{ and }Br_2`.

The given balanced chemical reaction will be :

`2AlCl_3+3Br_2\rightarrow 2AlBr_3+3Cl_2`

By the stoichiometry we can say that, 2 moles of
`AlCl_3` react with 3 moles of
`Br_2` to give 2 moles of
`AlBr_3` and 3 moles of
`Cl_2` as a product.

That means,

The mole ratio between the
`AlCl_3:Br_2:AlBr_3:Cl_2` are
`2:3:2:3` respectively.

Thus, the mole ratio for aluminium chloride to chlorine is, 2 : 3

Answer 2

To answer this item what needs to be done is to write the correct and balanced chemical reaction as below.
2AlCl3 + 3Br2 --> 2AlBr3 + 3Cl2
From the chemical reaction above, we can say that every 2 moles of AlCl3 will produce 3 moles of Cl2. Thus, the answer is 2:3.