Question

How many grams of solid NaOH are needed to prepare 200. mL of a 5.00% by
volume NaOH solution

A) 8
B) 10
C) 9
D) 7

Answer 1

Answer:

10

Explanation:

Each 100 ml should have 5 solid naom to have 5%,

For 200 ml: 200 *5%=10

Answer 2

The grams of Solid NaOH needed is : ( B )  10 grams

Volume of solution = 200 mL

Percentage of solid NaOH in solution = 5.0%

Therefore the grams of solid NaOH required to prepare a 200mL solution that contains 5.0% solid will be :

5% * 200 mL

= 10 grams

Hence we can conclude that the grams of solid NaOH needed is 10 grams

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