If 33.7 grams of LiOH dissolve in enough water to make a 231-gram solution, what is the concentration in percent by mass?
To find the concentration in percent by mass, we need to calculate the mass of LiOH in the solution and then determine what percentage it is of the total mass of the solution.
First, we start by calculating the mass of the LiOH in the solution:
Mass of LiOH = 33.7 grams
Next, we calculate the total mass of the solution by adding the mass of LiOH to the mass of the water:
Mass of LiOH + Mass of water = 33.7 grams + (231 grams - 33.7 grams)
= 33.7 grams + 197.3 grams
= 231 grams
Now, we can calculate the concentration in percent by mass by dividing the mass of LiOH by the total mass of the solution and multiplying by 100:
Concentration in percent by mass = (Mass of LiOH / Total mass of solution) * 100
= (33.7 grams / 231 grams) * 100
= 0.146 * 100
= 14.6 percent
Therefore, the concentration of LiOH in the solution is 14.6 percent by mass.