Q. 18

# What is meant by the concentration of a solution? Explain by giving an example.

The concentration of a solution is the amount of solute present in a given amount of solution or solvent. This can be mathematically written as:

The concentration of solution =

Or

The concentration of solution =

Mainly one expresses concentration in 2 ways:

(a) Mass by mass percentage:

(b) Mass by volume percentage:

Eg:

Consider 30g of sugar (solute) dissolved in 150g of water (solvent).

Then the mass of solute = 30g

Mass of solvent = 150g

Mass of solution = Mass of solute + mass of solvent

= 30+150

= 180g

Therefore the concentration of solute expressed using mass by mass percentage is:

Mass by mass percentage of solution = (Mass of solute/Mass of solution) x 100

= 16.6%

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