Question

What is the equation for aluminum bromide plus chlorine gas yields aluminum chloride and bromine gas?

Answer 1

`2AlBr_3 + 3Cl_2 -> 2AlCl_3 + 3Br_2`

Explanation:

Translate names to symbols
`AlBr_3 + Cl_2 -> AlCl_3 + Br_2`
Balance Cl and Br by adding atoms
`AlBr_3 + 3/2Cl_2 -> AlCl_3 + 3/2Br_2`
Multiply by 2 to get to the nearest whole number
`2AlBr_3 + 3Cl_2 -> 2AlCl_3 + 3Br_2`