Question

In Mier's theory of supersaturation, solubility chart displays the profile of curve with positive and very low slope in

• A. KNO₃
• B. NaCl
• C. MnSO₄
• D. None of the above

Answer 1

The Correct Option is B

Mier's theory of supersaturation discusses the thermodynamics and solubility behavior of various solutes. The solubility curve represents how solubility changes with temperature. In the context of this question, we are considering the solubility behavior of different salts.

Let's evaluate each option using the concept:

1. KNO₃: The solubility curve of potassium nitrate (KNO₃) shows a steep upward slope. It is highly temperature-dependent, meaning that it has high solubility at higher temperatures.
2. NaCl: The solubility curve of sodium chloride (NaCl) exhibits a curve with a positive but very low slope. This means that its solubility only slightly increases with temperature.
3. MnSO₄: The solubility curve of manganese sulfate (MnSO₄) typically shows a positive slope, but not as significantly as KNO₃. However, it is not as low as that of NaCl.
4. None of the above: Since NaCl fits the criteria given, this option is incorrect.

Thus, based on the description of the solubility curve with a positive and very low slope, the correct answer is NaCl.

In summary, NaCl fits Mier's theory as a substance having a solubility curve with a positive but low slope, which means that its solubility does not significantly change with temperature changes. This understanding is crucial in various applications, especially when predicting the behavior of solutions in chemical and pharmaceutical contexts.