m₁(KNO₃) = ω₁(KNO₃)·m(р-ра) = 0,05·250 = 12.5(г)
m₂(KNO₃) = 12,5 + 10 = 22.5(г)
m₂(р-ра) =250 + 10 = 260(г)
ω₂% = 22,5·100/260 = 8,65(%)
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m₁(KNO₃) = ω₁(KNO₃)·m(р-ра) = 0,05·250 = 12.5(г)
m₂(KNO₃) = 12,5 + 10 = 22.5(г)
m₂(р-ра) =250 + 10 = 260(г)
ω₂% = 22,5·100/260 = 8,65(%)