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What is the concentration of a solution containing 2g of NaOH in 100cm3 of solution?...

Chemistry
JAMB 2016
What is the concentration of a solution containing 2g of NaOH in 100cm3 of solution?
[Na=23, O=16, H=1]
  • A. 0.05 moldm-3
  • B. 0.30 moldm-3
  • C. 0.50 moldm-3
  • D. 0.40 moldm-3
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Correct Answer: Option C
Explanation
2g NaOH is contained in 100cm3
Xg NaOH is contained in 1000cm3

Xgram = \(\frac{2\times 1000}{100}\) = 20g

Mole = \(\frac{20}{40}\) = 0.50mol/dm3

There is an explanation video available below.

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