In CHEM 160, you learned that AgBr does not dissolve in water.  Why is that?  (Choose the best answer.) Group of answer choices A:It is possible to separate the Ag+ and Br- ions in water under reasonable conditions but this step requires more energy than what is released by the solvation of these ions by H2O molecules. B:We lied in CHEM 160 - AgBr is actually very soluble in water. C:It is possible to separate the Ag+ and Br- ions in water under reasonable conditions and this step requires less energy than what is released by the solvation of these ions by H2O molecules. D:Separating the Ag+ and Br- ions to an appreciable extent in water requires to much energy to accomplish under reasonable conditions. Consider this picture depicting the hydration of an atom or ion by water molecules.  Of the choices below, what is the only atom or ion that the yellow particle in the center can be?   Group of answer choices A:K+ ion B:oxygen atom in ethanol (CH3CH2OH) C:Cl- ion D:nitrogen atom in ammonia (NH3)   The solubility of sulfur hexafluoride (SF6) gas in water is 2.1 x 10-4 M at 20 oC.  Based on the choices below and without doing any calculations, what is the most likely solubility of SF6 if the solution temperature is lowered to 5 oC? Group of answer choices A:2.1 x 10-4 M B:5.6 x 10-4 M C:2.1 x 10-6 M D:1.0 x 10-4 M

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In CHEM 160, you learned that AgBr does not dissolve in water.  Why is that?  (Choose the best answer.)

Group of answer choices

A:It is possible to separate the Ag+ and Br- ions in water under reasonable conditions but this step requires more energy than what is released by the solvation of these ions by H2O molecules.

B:We lied in CHEM 160 - AgBr is actually very soluble in water.

C:It is possible to separate the Ag+ and Br- ions in water under reasonable conditions and this step requires less energy than what is released by the solvation of these ions by H2O molecules.

D:Separating the Ag+ and Br- ions to an appreciable extent in water requires to much energy to accomplish under reasonable conditions.

Consider this picture depicting the hydration of an atom or ion by water molecules.  Of the choices below, what is the only atom or ion that the yellow particle in the center can be?

 

Group of answer choices

A:K+ ion

B:oxygen atom in ethanol (CH3CH2OH)

C:Cl- ion

D:nitrogen atom in ammonia (NH3)

 

The solubility of sulfur hexafluoride (SF6) gas in water is 2.1 x 10-4 M at 20 oC.  Based on the choices below and without doing any calculations, what is the most likely solubility of SF6 if the solution temperature is lowered to 5 oC?

Group of answer choices

A:2.1 x 10-4 M

B:5.6 x 10-4 M

C:2.1 x 10-6 M

D:1.0 x 10-4 M

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