Question

How many moles of water are contained in 0.250 mol of cuso4 5h2o?

Answer 1

1 mol CuSO₄·5H₂O ----------- 5 mol H₂O
0,25 mol CuSO₄·5H₂O ---- Xmol H₂O
X = 5×0,25 = 1,25 mol H₂O

Answer 2

The ratio of the mass to the molar mass is called moles.  The number of moles in copper sulfate pentahydrate is 1.25 moles of water.

What are moles?

Moles are the base unit for the calculation of the amount of solute present in the solution or the compound. It can be calculated by the formula,

$\rm Moles = \dfrac{mass}{\rm molar \;mass}$

In the compound of copper sulfate pentahydrate, the ratio of the copper sulphate and water is given as 1:5.

If 1 mole of copper sulfate pentahydrate = 5 moles of water

Then, 0.250 moles of copper sulfate pentahydrate = x moles of water

Solving for x:

$\begin{aligned} \rm x &= \dfrac{0.25\times 5}{1}\\\\&= 1.25\;\rm moles\end{aligned}$

Therefore, 1.25 moles of water is present in copper sulfate pentahydrate.

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