Question

How can i balance Na + Ca2+ --> Ca + Na+

Answer 1

`2Na + Ca^(2+) \rightarrow Ca + 2Na^+`

Step-by-step explanation:

Hello!

In this case, since this a reaction in which the oxidation state of the metals is changing, we need to apply a redox method for which:

`Na\rightarrow Na^++e^-\\\\Ca^(2+)\rightarrow Ca+2e^-\\\\\\2Na\rightarrow 2Na^++2e^-\\\\Ca^(2+)\rightarrow Ca+2e^-`

Thus, the result is:

`2Na + Ca^(2+) \rightarrow Ca + 2Na^+`

Regards!