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Answer to Question #3809 in Physical Chemistry for jessica santiago

Question #3809
1. Correct each false statement: (10 points total) 1.1. Reactions that do not go to completion must have been performed carelessly.
(see section 10.1) 1.2.
If two reactant molecules collide, they will react. (section 10.4, figure 10.3)
1.3. Equilibrium constant expressions can be calculated from the initial amounts of reactants chosen for a trial. (&sect;10.5)
1.4. If the Ksp for substance X is greater than the Ksp for substance Y, the molar solubility of X
must be greater than the molar solubility of Y. 1.5. The Ksp of a substance varies in the presence of a common ion.
1
2011-08-08T06:37:38-0400
Correct each false statement:
1.1. Reactions that do not go to completion must have been performed carelessly.
Correct: Most reactions do not go to completion and it does not depend on the carelessness.

1.2. If two reactant molecules collide, they will react.
Correct: If two reactant molecules collide, maybe they will react.

1.3. Equilibrium constant expressions can be calculated from the initial amounts of reactants chosen for a trial.
Correct: Equilibrium constant expressions can be calculated only from the equilibrium amounts of reactants.

1.4. If the Ksp for substance X is greater than the Ksp for substance Y,the molar solubility of X must be greater than the molar solubility of Y.
Correct: If the Ksp for substance X is greater than the Ksp for substance Y, and this substances are ionic compounds of the same type (AxBy, as Ca(OH)2 and Ba(OH)2),the molar solubility of X must be greater than the molar solubility of Y.

1.5. The Ksp of a substance varies in the presence of a common ion.
Correct: Ksp is constant.

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