The value of solubility product of CaF 2 has to be calculated. Concept Introduction: Solubility is the maximum amount of a solute that can be dissolve given mass of solvent at a given temperature. The term soluble is used for a pair of substances that forms a homogenous mixture. The term insoluble is used for a pair that does not mix with each other. Solubility product expression is the product of initial concentrations of the ions generated by the sparingly soluble salt in solution. The formula of the solubility product is shown below. K s p = [ A + ] [ B − ]

Question

Using the conditions of spontaneity to deduce the signs of AH and AS Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction observations conclusions A This reaction is always spontaneous, but proceeds slower at temperatures above 120. °C. ΔΗ is (pick one) AS is (pick one) ΔΗ is (pick one) B This reaction is spontaneous except above 117. °C. AS is (pick one) ΔΗ is (pick one) This reaction is slower below 20. °C than C above. AS is |(pick one) ? 18 Ar 1

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Question

Chapter 15, Problem 59QRT

Interpretation Introduction

Interpretation:

The value of solubility product of CaF2 has to be calculated.

Concept Introduction:

Solubility is the maximum amount of a solute that can be dissolve given mass of solvent at a given temperature. The term soluble is used for a pair of substances that forms a homogenous mixture. The term insoluble is used for a pair that does not mix with each other. Solubility product expression is the product of initial concentrations of the ions generated by the sparingly soluble salt in solution. The formula of the solubility product is shown below.

Ksp=[A+][B−]

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