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Z def. rozpuszczalności
40g CuSO4-----100g wody
xg CuSO4------300g wody
x=120g CuSO4
Robisz proporcje:
40g CuSO4-----100g wody (40g CuSO4 na 100g wody)
xg CuSO4------300g wody (xg CuSO4 na 300g wody)
40g x 300g = 100x
12000 = 100x /:100
x = 120g
Odp.: 120g gramów CuSo4 trzeba
rozpuścić w 300g wody.