Question

A sample of NaOH containedtn, x
20% moisture. The weight of
that NaOH sample needed
for the preparation of 100ml
of 0.5M NaOH solution is x
g. Report the answer as 2x.​

Answer 1

The correct answer is 2.0 Grams and to make it 2 times it will be 4 Grams.

Explanation:

• Since we know, 1000 ml of 1 M NaOH has 40 g so we conclude from this that 100 ml of 0.5 M sodium hydroxide (NaOH) would have = 40 x 100/1000 x 0.5. This gives us 2 - grams.

• To make 100 ml of 0.5M NaOH, we add 2- grams of NaOH in a flask of about along with distilled water. This water is added to a certain mark for uniformity.

• One should always close this flask with a cork to avoid any reactions.

• Since it will react with carbon dioxide of the atmosphere and become less potent.

Answer 2

Answer:

5

Explanation:

Use the formula

M= w.t/G.M.wt × 1000/Volume(ml)