Question on: JAMB Chemistry - 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 Option: C
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
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