Question

define molarity. what are its unit ? what is the effect of temperature on molarity of a solution?

Answer 1

Answer:

Molarity

It is defined as the number of moles of solutes present in 1 litre of solution.

$molarity = \frac{no. \: of \: moles}{vol. \: of \: solution}$

SI unit of moles = mol.

SI unit of volume = litre.

∴ SI unit of molarity is mol/litre

Effect of temperature on molarity

We know that molarity is dependent on the volume of the solution. At the same time, we have learnt in Physics, volume of any fluid is dependent on temperature.

As per volume expansion , we can say that: volume increases with temperature increase.

Since volume (in denominator) increases, the value of Molarity decreases.

Hence ;

Molarity ∝ 1/(Temperature)

Answer 2

Explanation:

• molarity is number of moles of solute in 1 litre of solvent.
• It's unit :moles per litre.