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Grade 12th passPhysical Chemistry

If 10 mL of 0.1 M aqueous solution of NaCl... If 10 mL of 0.1 M aqueous solution of NaCl is divided into 1000 drops of equal volume. What is the concentration of one drop?

Profile image of Shweta
7 Years agoGrade 12th pass
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1 Answer

Profile image of Samyak Jain
7 Years ago
The concentration of solution will not change if we divide it into equal volumes.
However, amount of solute differs from a small volume to a large volume.
Here there are 10 ml x 0.1 M = 1 mmol in 10 ml of solution.
Volume of each drop = 10 ml/ 1000 = 10–2 ml and in this there are 1 mmol/ 1000 = 10–3 mmol of NaCl.
New concentration of each drop = Number of mmol of NaCl / Volume of solution in ml
                                        = 10–3 mmol/10–2 ml  =  0.1 M