G 10
Chemistry worksheet(9)
sec5.1
Ionic Compounds
Part One: Multiple Choices
1. A substance will conduct an electric current if it _____
A. is wet
B. forms ions in solution
C. is covalent
D. consists of ions in the dry state
2. Which of the following is the correct chemical formula for a formula unit of aluminum bromide?
A. AlBr3
B. Al2Br6
C. Al3Br9
D. Al4Br12
3. Based on its position in the periodic table, the most likely charge of an iodide ion is _____
A. 1+
B. 1
C. 2+
D. 7
4. Which of the following formulas is incorrect?
A.
B.
C.
D.
Al2(SO4)3
AlOH3
Ca(OH)2
(NH4)2S
5. The correct name for Fe2S3 is _____
A.
B.
C.
D.
iron(III) sulfide
iron sulfide
iron(II) sulfide
iron(I) sulfide
6. Which of the following compounds can be used as a drying agent?
A.
B.
C.
D.
CuSO4 . 5H2O
hygroscopic alum
calcium chloride dihydrate
the dihydrate of calcium sulfate
7. The formula for the compound formed from polyatomic ions NH 4 and PO43 is
A. NH4(PO4)3
B. NH4PO4
C. (NH4)3PO4
D. (NH4)2(PO4)2
8. The name for Al(OH)3 is ______
A.
B.
C.
D.
Aluminum (III) hydroxide
Aluminum trihydroxide
Aluminum hydroxide
Aluminum (I) hydroxide
9. Which formula represents lead (II) chromate?
A.
B.
C.
D.
PbCrO4
Pb2CrO4
Pb(CrO4)2
Pb2(CrO4)
10. Compounds containing only two chemical elements are called
A.
B.
C.
D.
heterogeneous substances
binary compounds
mixtures
ternary compounds
11. Which of the following is a binary compound?
A.
B.
C.
D.
H2SO4
O2
HCN
H2S
12. The correct name for FeO is
A.
B.
C.
D.
iron monoxide
iron(I) oxide
iron(II) oxide
iron(III) oxide
13. The oxidation number on a potassium ion in its ionic compounds is ____
A.
B.
C.
D.
2+
Various charges are possible.
1+
2
14. Which of the following is not the correct chemical formula for the compound named?
A. calcium sulfate
CaSO4
B. beryllium oxide
BeO
C. nickel (II) peroxide Ni2O
D. ammonium chromate (NH4)2CrO4
15. The name of the compound Pb(NO3)2 is _____
A.
B.
C.
D.
lead nitrate
lead(II) nitrite
lead(II) dinitrate
lead(II) nitrate
16. The name of the compound NH4ClO4 is _____
A. ammonium chlorite
B. ammonium chlorate
C. ammonium perchlorate
D. ammonium hypochlorate
17. The correct formula for the carbonate ion is _____
A. CO42
B. CO33
C. CO32
D. CO42
18. The correct formula for ammonium sulfate is _____
A.
B.
C.
D.
NH4SO4
(NH4)2SO4
(NH3)2SO3
(NH4)2SO3
19. Which of the following is named incorrectly? What should its name be?
A. Fe(OH)2; iron(III) hydroxide
B. Sn3(PO4)4; tin(IV) phosphate
C. FeSO4; iron(II) sulfate
D. All are correct.
20. A substance that has atoms held together by covalent bonds rather than ionic bonds is known as:
A.
B.
C.
D.
Ionic compound
Molecular substance
Covalent compound
Polar covalent compound
Part Two: Long Questions
1. The compounds below all contain polyatomic ions. Name each of them.
a. K2SO4________________________ Mg2(PO4)2______________________
b. Fe(OH)3 _______________________ Cu(ClO3)2 ______________________
c. Al2(Cr2O7)3______________________ PbCO3________________________
d. Ca(CN)2_________________________NH4NO3_______________________
2. From the given names, write the formulas for the following compounds.
a. Potassium acetate ____________ Sulfur hexafluoride __________________
b. Cobalt (II) chloride____________ Manganese (IV) oxide________________
c. Calcium Nitrate________________ sodium sulfate____________________
e. Silver chloride________________ lithium hydrogen carbonate_____________
3. Write the names of the following hydrates:
a) Cu(NO3)2 · 3H2O
b) K2C2O4 · H2O
c) Ni(C2H3O2)2 · 4H2O
d) Na2HPO4 · 7H2O
4. Write the formula for each of the following binary ionic compounds:
a) cesium iodide
b) potassium selenide
c) aluminum fluoride
d) calcium phosphide
5. Write the formula for the compound formed from each of the following pairs of elements:
a) barium and sulfur
b) rubidium and chlorine
c) lithium and oxygen
d) gallium and fluorine
6. Name the ionic compound represented by each formula:
a) K2CO3
b) CaHPO4
c) Na2C2O4
d) NH4HSO4
e) Mg(MnO4)2
7. Write the formula for the compound made from each of the following pairs of ions:
a) cesium and sulfate ions
b) aluminum and hydroxide ions
c) beryllium and nitrate ions
d) ammonium dihydrogen phosphate ions
8. Write the formula for each of the following compounds containing transition elements:
a) chromium(II) sulfate
b) gold(III) selenide
c) iron(II) phosphate
d) copper(I) nitride
9. Write the formula for the following hydrates
a) cobalt(II) chloride hexahydrate
b) barium hydroxide octahydrate
c) gallium(III) oxide monohydrate
d) magnesium hydrogen arsenate heptahydrate
10. The metals in the following compounds can have various oxidation numbers. Predict the charge on
each metal ion, and write the name of each of the following compounds:
a) PbSO4
b) CuCN
c) SnS2
d) Bi2(C2O4)3
11. Vanadium is a transition element with multiple oxidation numbers. Write the names of the following
compounds containing vanadium:
a) V2S3
b) VF4
c) V2(SO4)3
d) V2O5
12. Complete the following table that compare between ionic and covalent compounds.
Property
Ionic Compound
Covalent Compound
State at room temperature
Melting point
Conductivity when dissolved
in water
Water solubility
13. Explain why ionic compounds cannot conduct electricity when they are in the solid state.
14. Compare between hydrate and an anhydrous compounds.
15. Compare between hygroscopic and deliquescent substances