Respuesta :
Answer:
The answer to the question is
The solution contains 4.73 % by mass of NaCl
Explanation:
To solve this we list out the variables thus
The Molarity of NaCl = 0.850 M,
Density of solution = 1.05 g/mL
Molar mass of NaCl = 58.44 g/mol
Therefore mass of NaCl in he solution = (58.44 g/mol) × (0.850 M) = 49.674 g of NaCl
However the density = 1.05 g/mL or 1050 g/L
Therefore the mass percent of NaCl in 1 liter of solution or 1050 g of solution = (49.674/1050) × 100 = 4.73 %
The concentration of NaCl in mass percent = 4.73 %
Answer:
4.74 %.
Explanation:
Molar mass of NaCl = 23 + 35.5
= 58.5 g/mol.
Molar concentration = molar mass/volume
Density = mass/volume
Converting g/ml to g/l,
1000 ml = 1 l
= 1.05 g/ml * 1000 ml/1 l
= 1050 g/l
Mass concentration = mass/volume
= molar concentration * molar mass
= 0.85 * 58.5
= 49.7325 g/l.
Comparing the density and the mass concentration in %,
= 49.7325 : 1050
= 4.74 %
