A solution contain 30g of sodium chloride mixed with 70g of water. calculate the concentration of this solution in term of mass %
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Answer:30%
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Mass of solute (NaCl) = 30g
Mass of solvent (water) = 70g
Mass of solution = mass of solute + mass of solvent
= 30+70
= 100g
Concentration of solution by mass %
= mass of solute / mass of solution × 100
=30/100 × 100
= 30 %
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