janjan8841 janjan8841

07-03-2018
Chemistry

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A chemist needs to prepare a solution of 1.7 m nacl. if 400. ml of the solution are required how many grams of nacl are needed? molar mass nacl = 58.5 g/mol

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najibtackie55 najibtackie55

07-03-2018

C=1.7M; M=58.5gmol-¹; V=400ml=400g; m=?
C=n/V
but n=m/V
=>C=m/MV
=>m=CMV
=1.7 x 58.5 x 400
=39780g

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