Reviewing Chemistry Concepts 3

1. Reviewing Chemistry Concepts 3 9 weeks exam review

2. Question 21 • What units are used to describe the solubility of a substance in a given solution? • A amount of solute per amount of solvent • B grams of solvent • C grams of solute • D grams of solvent per gram of solute

3. Question 22 Which substance would be least likely to dissolve in a polar solvent. • Ionic compound • Polar molecule • Acids • Nonpolar molecule

4. Question 23 • Which of the following is true about atoms: • Are charged particles • Have the same number of protons and electrons • Have the same number of neutrons and protons • All atoms have the same mass

5. Question 24 • Based on information from the periodic table, which two elements will bond in ratio similar to that of lithium oxide? (2:1) • A magnesium and sulfur • B sodium and fluorine • C hydrogen and sulfur • D magnesium and oxygen

6. Question 25 • Any substance that does NOT conduct electricity when in solution is called a(n) ? • A nonelectrolyte • B electrolyte • C conductor • D semiconductor

7. Question 26 • F blue • G green • H yellow • J red

8. Question 27 • Which of the following atoms would have the largest ionic radius? • A lithium • B sodium • C potassium • D cesium

9. Question 28 • Which of the following is the best way to determine if an aqueous solution of sodium acetate (NaC2H3O2) is supersaturated? • A Add water to the solution. • B Measure the temperature of the NaC2H3O2. • C Filter all the NaC2H3O2 out of the solution. • D Add a crystal of NaC2H3O2to the solution.

10. Question 29 • How many grams of iron (III) chloride, FeCl3, should be added to a 100.0mL volumetric flask in order to prepare 0.050 M FeCl3? (Answer with significant digits.)

11. Question 30 • "An electron must occupy the lowest available energy orbital" is stated by — • F the Aufbau Principle • G Hund's Rule • H the Pauli Exclusion Principle • J Bohr's Law