Question

Learning Task 3
Find the percent by mass and/ or percent by volume of each component of the solution below.

Example: Find the mass percentage of 6 g sodium hydroxide dissolved in 50 g of water.

Given: mass of solute= 6 g sodium hydroxide
mass of solution = 6 g sodium hydroxide + 50 g of water

Formula: percent by mass= (mass of solute/ mass of solution) x 100

Solution:
First find the total mass of the solution:
total mass = 6 g sodium hydroxide + 50 g water
total mass = 56 g
Now, you can find the mass percentage of the sodium hydroxide using the formula:
mass percent = (grams of solute / grams of solution) x 100
mass percent = (6 g NaOH / 56 g solution) x 100
mass percent = (0.1074) x 100
answer = 10.74% NaOH


A solution is prepared by dissolving 15 g of cane sugar in 60 g of water. Calculate the mass percent of each component of the solution.

Given:

Formula:

Solution:


Calculate the mass percentage of benzene and carbon tetrachloride if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.

Given:

Formula:

Solution:

Answer 1

Explanation:

Given:

mass of cane sugar=15g

mass of water=60g

Total mass =15g+60g

=75g

Formula:

(mass of solute / mass of solution)×100

Solution:

15g/60g×100%

1/4×100%

25%

hope it helps you