## Elements with +2 charge

Mya Majewski 1L
Posts: 89
Joined: Fri Sep 25, 2015 3:00 am

### Elements with +2 charge

In the review problems for E:23,

How do you calculate the amount (in moles) Cu^2+ ions in 3.00 g of CuBr2?

Rex Lee 1C
Posts: 48
Joined: Fri Sep 25, 2015 3:00 am

### Re: Elements with +2 charge

Mya Majewski 1K wrote:In the review problems for E:23,

How do you calculate the amount (in moles) Cu^2+ ions in 3.00 g of CuBr2?

First, convert $CuBr_{2}$ into moles. Looking at the chemical formula, there is one atom of $Cu$
for every formula unit of $CuBr_{2}$. Therefore, the amount of moles of $Cu^{2+}$ in the sample is the same amount as the total moles of $CuBr_{2}$.

$3.00 g CuBr_{2}\times \frac{1 mol CuBr_{2}}{223.37g}\times \frac{1 mol Cu^{2+}}{1 mol CuBr_{2}}$