Question on: JAMB Chemistry - 2018
To what volume must 300cm\(^3\) of 0.60M sodium hydroxide solution be diluted to give a 0.40M solution?
A
450cm\(^3\)
B
300cm\(^3\)
C
200cm\(^3\)
D
150cm\(^3\)
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Correct Option: A
From the dilution law:
 C\(_1\)V\(_1\) = C\(_2\)V\(_2\)
 C\(_1\) = Initial conc. of NaOH = 0.6M
 V\(_1\) = Initial Volume of NaOH = 300cm3
 C\(_2\) = Final conc. of NaOH = 0.4M
 V\(_2\) = Final Volume of NaOH = ?
 V\(_2\) = \(\frac{C_1V_1}{C_2}\)
 V\(_2\) = \(\frac{0.6 \times 300}{0.4}\)
 V\(_2\) = 450 cm\(^3\)
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