Question

Now that we have put a coefficient of 3 in front of caso4, what coefficient should go in front of cacl2 to balance calcium (ca)?

Answer 1

3 to balance the calciums on both sides of the equation, but only if that balances the Cl on both sides of the equation to because you now have 6 Cl and 3Ca 

Answer 2

3 (three).

Step-by-step explanation:

Hello,

Perhaps, you are talking about the following undergoing chemical reaction:

`CaSO_4+AlCl_3-->CaCl_2+Al_2(SO_4)_3`

Thus, balancing it by inspection, one obtains:

`3CaSO_4+2AlCl_3-->3CaCl_2+Al_2(SO_4)_3`

In such a way, a 3 (three) must be placed in front of the calcium chloride
`CaCl_2` in order to balance calcium and consequently the rest of the chemical reaction.

Best regards.