ANSWERS to Practice-QUIZ Ch. 7- Ionic Compounds

Part 1: Multiple Choice:

  1. What is the ionic charge on the manganese ion in the ionic compound that has the formula MnO2?  (a) 2+  (b) 3+  (c) 4+  (d) 7+

  2. Elements of Group VIA  (a) generally form -1 anions.  (b) generally form -2 anions.  (c) generally form +2 cations.  (d) do not combine with other elements.

  3. Which element when combined with aluminum would most likely form an ionic compound?  (a) calcium  (b) sulfur  (c) sodium  (d) none of these

  4. All of the following are ionic compounds except: (a) LiCl. (b) AlCl3. (c) CCl4. (d) MgCl2.

  5. Atoms exchange or share electrons in order to acquire the electron configurations of a noble gas.  This statement is called:  (a) Noble Gas Rule.  (b) The Periodic Law.   (c)  The Octet Rule.  (d)  Aufbau Principle.

  6. What is the name of the following polyatomic ion, ClO2-?  (a) perchlorate (b) chlorate  (c) chlorite  (d) chlorine dioxide

  7. Which is the formula of the phosphate ion?  (a) PO43-  (b) PO33-  (c) PO42-  (d) PO32- 
     

  8. Write the formulas for the following compounds.

  1. strontium hydroxide  Sr(OH)2

  2. nickel (II) sulfate NiSO4

  3. lead (IV) oxide PbO2

  4. cadmium fluoride CdF2

  5. scandium silicate Sc2(SiO3)3

  6. iron (II) oxalate FeC2O4

  7. sodium hydrogen sulfate NaHSO4

  8. potassium cyanide KCN

  9. ammonium carbonate (NH4)2CO3

  1. Name the following compounds.

  1. CdBr2 cadmium bromide

  2. NiPO3  nickel (III) phosphite

  3. Li2CrO4  lithium chromate

  4. Mg(ClO2)2 magnesium chlorite

  5. Al2Se3 aluminum selenide

  6. Ti(Cr2O7)2 titanium (IV) dichromate

  7. MnO2 manganese (IV) oxide

  1. Name the following polyatomic ions:

  1. C2H3O2-  acetate

  2. ClO4-  perchlorate

  3. SO32-  sulfite

  4. NO2- nitrite

  5. HPO42- hydrogen phosphate

  6. HSO3- hydrogen sulfite

  1. Give the formula for the following polyatomic ions:

  1. Oxalate C2O42-

  2. Ammonium NH4+

  3. Cyanide CN-

  4. Chlorate ClO3-

  5. Hypochlorite ClO-

  6. Nitrate NO3-

  7. Permanganate MnO4-

  1. List four physical properties of ionic compounds. high melting point, brittle, crystalline, conduct electricity when dissolved in water or in molten state, solid at room temperature, made from a metal and non-metal.