Which of the following concentration unit is temperature dependent:
Correct answer: C. Molarity
- A. Molality
- B. Mole Fraction
- C. Molarity
- D. Both Molality and Molarity
Explanation
Molarity of a solution depends upon temperature because volume of a solution is temperature dependent. What happens is that when the temperature is increased the distance between the molecules in a liquid increase leading to volume expansion. In turn leading to decrease in molarity. Molarity = Moles of solute / volume of solution
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Solutions are described using molarity, molality, normality, mole fraction, percentage concentration and parts per million. Coverage also includes vapour-pressure lowering, boiling-point elevation, freezing-point depression and osmotic pressure, then distinguishes true solutions, colloids and suspensions by particle size, stability, light scattering and settling.
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