How many grams of NaOH are needed to make 750 mL of a 2.5% (w/v)solution?
A)3.9 g
B)7.5 g
C)19 g
D)20 g
E)50 g

Question

Quizplus · Accepted Answer

We can start by using the formula:

mass (g) = volume (mL) x concentration (w/v)

Converting the given volume to grams:

750 mL x 1 g/mL = 750 g

Substituting the values into the formula:

mass (g) = 750 g x 2.5% = 18.75 g

Rounding off to the nearest gram, we get:

mass (g) = 19 g

Therefore, the correct answer is C) 19 g.

How Many Grams of NaOH Are Needed to Make 750