1. All of the fundamental principles below are important in understanding the formation of solutions except which one? (A) Molecules with similar molecular masses are required to form solutions. (B) Starting at equilibrium, moving particles apart while in the solid or liquid phases requires added energy proportional to the attractive forces. (C) Bringing particles together releases energy in proportion to their attractive forces. (D) The total energies in steps 1 to 3 indicates if a solution will form.

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Step 1: Solvent molecules are separated from each other to make room for the solute.
Step 2: Solute molecules are separated so they fit into spaces in the solvent.
Step 3: Separated solute and solvent molecules are brought together filling in the spaces.
1. All of the fundamental principles below are important in understanding the formation of solutions
except which one?
(A) Molecules with similar molecular masses are required to form solutions.
(B) Starting at equilibrium, moving particles apart while in the solid or liquid phases requires
added energy proportional to the attractive forces.
(C) Bringing particles together releases energy in proportion to their attractive forces.
(D) The total energies in steps 1 to 3 indicates if a solution will form.
2. A 20.00 ml sample of a Ba(OH)2 solution is titrated with 0.245 M HCI. If 27.15 mL of HCI is required,
what is the molarity of the Ba(OH)2 solution?
A) 0.166 M
B) 0.180 M
(C) 0.333 M
(D) 0.666
3. What is the mass percent of oxygen in Al2(SO4)3-18H2O? (molar mass is 666.43 g/mole)
(A) 9.60 %
(B) 28.8 %
(C) 43.2 %
(D) 72.0 %
Transcribed Image Text:Step 1: Solvent molecules are separated from each other to make room for the solute. Step 2: Solute molecules are separated so they fit into spaces in the solvent. Step 3: Separated solute and solvent molecules are brought together filling in the spaces. 1. All of the fundamental principles below are important in understanding the formation of solutions except which one? (A) Molecules with similar molecular masses are required to form solutions. (B) Starting at equilibrium, moving particles apart while in the solid or liquid phases requires added energy proportional to the attractive forces. (C) Bringing particles together releases energy in proportion to their attractive forces. (D) The total energies in steps 1 to 3 indicates if a solution will form. 2. A 20.00 ml sample of a Ba(OH)2 solution is titrated with 0.245 M HCI. If 27.15 mL of HCI is required, what is the molarity of the Ba(OH)2 solution? A) 0.166 M B) 0.180 M (C) 0.333 M (D) 0.666 3. What is the mass percent of oxygen in Al2(SO4)3-18H2O? (molar mass is 666.43 g/mole) (A) 9.60 % (B) 28.8 % (C) 43.2 % (D) 72.0 %
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