If 35.8 grams of LiCl are dissolved in 184 grams of water, what is the concentration of the solution in percent by mass?
% by mass means grams solute/100 g solution.
You have 35.8 g LiCl of solute.
Total solution is 184 g H2O and 35.8 g LiCl for total of ??
(35.8/total grams)*100 =
To find the concentration of the solution in percent by mass, you need to calculate the mass of the solute (LiCl) and divide it by the total mass of the solution (LiCl + water), and then multiply by 100.
First, calculate the mass of LiCl by using its given value as 35.8 grams.
Next, calculate the total mass of the solution by adding the mass of LiCl (35.8 grams) to the mass of water (184 grams).
Now, divide the mass of LiCl (35.8 grams) by the total mass of the solution (35.8 grams + 184 grams), and then multiply by 100 to get the concentration percent by mass.
The calculation would look like this:
Concentration percent by mass = (mass of LiCl / total mass of solution) * 100
Substituting the values:
Concentration percent by mass = (35.8 grams / (35.8 grams + 184 grams)) * 100
Now, solve the equation:
Concentration percent by mass = (35.8 grams / 219.8 grams) * 100
Concentration percent by mass ≈ 16.3%
Therefore, the concentration of the solution is approximately 16.3% by mass.