Sodium hydroxide is often sold as a concentrated solution containing 12.0 mol dm–3 of sodium hydroxide.
Calculate the volume of water that should be added to 10.0 cm3 of a 12.0 mol dm–3 solution of sodium hydroxide to make a 0.250 mol dm–3 solution. Show your working.
Answer:
Total volume = (10 × 12) / 0.25 = 480 (cm3) M1
Allow any correct method.
Therefore add 470 (cm3) M2
For M2, allow M1 – 10, even if M1 is incorrect.
Correct answer without working scores 1 mark only.
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