1. Consider the dissolution of an ionic salt in water. Which of the following st
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Question
1. Consider the dissolution of an ionic salt in water. Which of the following statements best explains why this process is considered a physical change? (A) The ionic salt can be recovered by evaporation of the water. (B) The ionic salt can be recovered by solidification of the water. (C) Dissolution of an ionic salt is mostly a physical change, and all physical changes are reversible. (D) Dissolution of an ionic salt is mostly a chemical change, and all chemical changes are reversible 2. For the reaction AB, for which value of K is the concentration of the reactants greater than the concen tration of the products? (A) K equals0 (B) K equals 1 (C) K is less than 1 (D) K is greater than 1Explanation / Answer
1. The ionic salt can be recovered by Evaporation of water.
In physical process the starting material can be recoverd by using physical process itself
Example: If a salt is dissolved in water to obtain a salt solution, If we boil the water off from the salt solution, We will obtain the salt, So it is considered as physical change.
2. K is less than 1
The equilibrium concentration of the reactant is greater than the concentration of the products the value of K will be less than 1.
The equilibrium concentration of the reactant is less than the concentration of the products the value of K will be greater than 1.
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