Molarity of a solution is change with temperature. Why ?

Question

Answer

Molarity depends upon Volume and volume depends on temp, So obviously Molarity changes with temperature

Answer

M=(w2/m2)×(1000/w1)
=n2/n1
Therefore,
PV=nRT
n=PV/RT
So, n=k×1/T

Answer

Effect of Temperature on Molarity
- Explanation:
When temperature changes, the volume of a solution changes as well. This is due to the fact that most substances expand when heated and contract when cooled. As a result, the concentration of a solution, which is expressed in terms of molarity (moles of solute per liter of solution), can be affected by temperature changes.
- Volume Change:
As the volume of the solution changes with temperature, the number of moles of solute remains constant. However, since molarity is calculated based on the volume of the solution, a change in volume will result in a change in molarity.
- Equation:
The equation for molarity is M = (moles of solute) / (volume of solution in liters). Therefore, if the volume of the solution changes due to a temperature change, the molarity will also change.
- Example:
For example, if a solution has a molarity of 1 M at 25°C and the temperature increases to 30°C, causing the volume of the solution to expand, the molarity of the solution will decrease because the volume in the denominator of the molarity equation has increased.
- Conclusion:
In conclusion, the molarity of a solution is affected by temperature changes due to the resultant changes in the volume of the solution. It is important to consider these changes when working with solutions in different temperature environments.

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