emroeser emroeser

01-11-2016
Chemistry

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How many g of nacl do need to make 1.00L of 2.5% w/v solution of nacl in water?

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Willchemistry Willchemistry

03-11-2016

2.5 % w/v ( that means we have 2.5 grams of solute in 100 mL solution )

1.00 mL = 1000 mL therefore:

2.5 g ------------- 100 mL
?? --------------- 1000 mL

1000 x 2.5 / 100 => 25.0 g of NaCl

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