Question

3) If 1.000 g of CuSO4-5H2O is dissolved in 25.00 mL of water, what is the concentration of Cu?* in

grams of Cu?per 25.00 mL of water?

Answer 1

0.16 M of Cu

Step-by-step explanation:

Molarity = moles/volume

Here, we have to find the moles from the molar mass of CuSO₄. 5H₂O is 249. 71 g/ mol

Now we can find the moles as,

1 g CuSO₄. 5H₂O × ( 1 mol CuSO₄. 5H₂O / 249. 71 g of CuSO₄. 5H₂O) × 1mol of Cu / 1 mol CuSO₄. 5H₂O

= 0.0040 mol Cu

Now we have to find the concentration in terms of molarity as,

molarity = moles/ volume = 0.0040 moles/ 0.025 L = 0.16 M of Cu.