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  4. What weight (in gram) of CuSO4⋅ 5H2O must be taken to make 0.5 litre of 0.01 M Cu ion solution? Express your answer by rounding-off to the nearest integer value. (Cu = 63 . 5 , S = 32 , O = 16 , H = 1)

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Q. What weight (in gram) of $CuSO_{4}\cdot 5H_{2}O$ must be taken to make $0.5$ litre of $0.01\,M\,Cu$ ion solution?
Express your answer by rounding-off to the nearest integer value. $\left(Cu = 63 . 5 , S = 32 , O = 16 , H = 1\right)$

NTA AbhyasNTA Abhyas 2022

Solution:

We know,
The molecular weight of $CuSO_{4}.5H_{2}O$ = $249.5\,g/mol$
Weight of $CuSO_{4}.5H_{2}O$ = $249.5\,g/mol\times 0.5L\times 0.01mol/L=1.2475\,g\approx 1\,g$