How many grams of NaCl are needed to prepare 35 kg of a 5 % (m/m) solution?

1 Answer
Jun 26, 2018

1.75 kg


To find the mass of NaCl, we'll use the formula:

#"%(m/m)" = "mass of solute"/"mass of solution"*100%#

NaCl in this case is the solute

Given from the question:
mass of solution = 35 kg
%(m/m) = 5%

Plug in the values:
#"%(m/m)" = "mass of solute"/"mass of solution"*100%="mass of NaCl"/"35 kg"*100%=5%#

#"mass NaCl"=5/100*35=1.75 kg#