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23 April, 13:12

A student prepared a solution of NaCl by dissolving 55.0g of sodium chloride in 570 mL of water. What is the percent by mass of the NaCl solution?

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  1. 23 April, 13:30
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    M (NaCl) = 55.0 g

    v=570 ml

    ρ=0.9982 g/ml

    m (H₂O) = vρ

    w=m (NaCl) / [vρ+m (NaCl) ]

    w=55.0/[570*0.9982+55.0]=0.0881 (8.81%)
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