Question

a solution contains 30 grams of common salt in 300 grams of water calculate the concentration in terms of mass by mass percentage of solution​

Answer 1

Answer:

MASS PERCENTAGE = MASS OF COMPONENT IN SOLUTION/TOTAL MASS OF SOLUTION*100

MASS OF COMMON SALT=30g

TOTAL MASS OF SOLUTION=MASS OF (COMMON SALT+WATER)=330g

THEREFORE, MASS PERCENTAGE=30/330=1/11=0.909.

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Answer 2

Given : A solution contains 30 g of common salt in 330 g of water.

　

To find : Calculate the concentration of solution?

　

Applying formula :

1) Mass of solution = Mass of solute + Mass of solvent.

2) Mass percentage = Mass of solute/Mass of solution × 100.

　

Calculations :

→ Mass of solution = 30 + 300

→ Mass of solution = 330

　

→ Mass percentage = 30/330 × 100

→ Mass percentage = 0.09 × 100

→ Mass percentage = 9%

　

Therefore, 9% is the mass percentage of the solution.