Question

Calculate the mass percentage of Na2SO4 in a solution containing 10.9 g Na2SO4 in 482 g water.

Answer 1

The mass % of Na2SO4 in this solution is 2.21 %

Step-by-step explanation:

Step 1: Data given

Mass of Na2SO4 = 10.9 grams

Mass of water = 482 grams

Step 2: Total mass

Total mass = mass Na2SO4 + mass H2O

Total mass = 10.9 grams + 482 grams = 492.9 grams

Step 3: Calculate the mass percentage

Mass % = (mass Na2SO4 / total mass)*100%

mass % = (10.9 grams / 492.9 grams) *100%

mass % =2.21 %

The mass % of Na2SO4 in this solution is 2.21 %

Answer 2

The answer to your question is 2.21 %

Step-by-step explanation:

Data

mass of Na₂SO₄ = 10.9 g

mass of H₂O = 482 g

Formula

Percent by mass =
`(mass of solute)/(total mass)` x 100

Substitution

`Percent by mass = (10.9)/(10.9 + 482)` x 100

Simplification and result

`Percent by mass = (10.9)/(492.9)` x 100

Percent by mass = 0.022 x 100

Percent by mass = 2.21