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Sagot :
Answer:
8 gram
Explanation:
in case of NaOH, normality=molarity
so normality=molarity×acidity or basicity(in case of NaOH it's 1)
then
weight of NaOH required = volume in ml × equivalent weight × normality / 1000
so
1000× 40× 0.2/1000
=8 gram
The total mass of sodium hydroxide (NaOH) needed to make the solution is 8 g (Option 4)
How to determine the mole of NaOH
- Volume = 1 L
- Molarity = 0.2 M
- Mole of NaOH =?
Molarity = mole / Volume
0.2 = mole of NaOH / 1
Mole of NaOH = 0.2 mole
How to determine the mass of NaOH
- Mole of NaOH = 0.2 mole
- Molar mass of NaOH = 40 g/mol
- Mass of NaOH =?
Mass = mole × molar mass
Mass of NaOH = 0.2 × 40
Mass of NaOH = 8 g
Learn more about molarity:
https://brainly.com/question/15370276
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