Question

What is the mass of NaCl required to make 150 grams of a 12% solution of NaCl in water? (5 points)

a
13 grams

b
18 grams

c
22 grams

d
32 grams

Answer 1

18

Step-by-step explanation:

Mass of solution = 150 g

Percent concentration = 12%

Percent concentration = mass of solute/mass of solution × 100

Let the mass of solute be x

12= x/150 × 100

12= 100x/150

12 × 150 =100x

x= 12 × 150/100

x = 18 g

Answer 2

18 grams

Step-by-step explanation:

Mass of solution = 150 g

Percent concentration = 12%

Percent concentration = mass of solute/mass of solution × 100

Let the mass of solute be x

12= x/150 × 100

12= 100x/150

12 × 150 =100x

x= 12 × 150/100

x = 18 g