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How To Calculate Molar Solubility Given Ksp

Molar Solubility Formula for 1:1 Salts:

\[ S = \sqrt{\frac{K_{sp}}{K}} \]

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1. What Is Molar Solubility?

Molar solubility refers to the maximum amount of a substance that can dissolve in a given amount of solvent at a specific temperature, expressed in moles per liter (mol/L). For 1:1 salts, it can be calculated directly from the solubility product constant (Ksp).

2. How Does The Calculator Work?

The calculator uses the molar solubility formula for 1:1 salts:

\[ S = \sqrt{\frac{K_{sp}}{K}} \]

Where:

Explanation: This formula applies specifically to 1:1 salts where the dissolution equilibrium involves equal numbers of cations and anions.

3. Importance Of Solubility Calculation

Details: Calculating molar solubility is essential for predicting precipitation reactions, designing chemical processes, understanding environmental fate of compounds, and optimizing pharmaceutical formulations.

4. Using The Calculator

Tips: Enter the solubility product constant (Ksp) and stoichiometric coefficient (K) as positive values. Both values must be greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What are 1:1 salts?
A: 1:1 salts are compounds where the cation and anion combine in a 1:1 ratio, such as NaCl, AgCl, or CaSO₄.

Q2: Why is the square root used in the formula?
A: The square root arises from the mathematical derivation of the solubility from the equilibrium expression for 1:1 salts.

Q3: Can this formula be used for other salt types?
A: No, this formula is specific to 1:1 salts. Different stoichiometries require modified formulas with different exponents.

Q4: What factors affect molar solubility?
A: Temperature, pH, common ion effect, and ionic strength can all influence the actual solubility of a compound.

Q5: How accurate is this calculation?
A: This provides a theoretical maximum solubility under ideal conditions. Actual solubility may vary due to real-world factors and solution conditions.

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