How many g of NaOH is needed to make 350.mL of a 2.50% (w/v)solution?
A)8.75 g
B)6.25 g
C)35.0 g
D)21.9 g
E)100.g

Name: How many g of NaOH is needed to make 350.mL of a 2.50% (w/v)solution? A)8.75 g B)6.25 g C)35.0 g D)21.9 g E)100.g
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Question

Quizplus · Accepted Answer

To find the grams of NaOH needed, use the formula for weight/volume percent: (mass of solute/volume of solution) x 100 = % (w/v). Rearranging gives mass of solute = (% (w/v) x volume of solution) / 100. Substituting the given values: (2.50 x 350 mL) / 100 = 8.75 g.

How Many G of NaOH Is Needed to Make 350