Answer to Question #92409 in General Chemistry for Dan Dionisio

Question

5-gram sample of sodium chloride (NaCl) was diluted in 70 grams of water. Determine the percentage composition by mass of the sodium chloride solution.

Answer 1

$Percentage \space composition = \frac {m \space of \space salt}{m \space of \space solution} \cdot 100 \% = \frac {5g}{5g +70 g} \cdot 100 \% = 6.67$ %