HW 9.2 #14,15,17,18,47,49,52,53
14. Binary ionic compounds (compounds composed of 2 elements) are written using the
name of the cation followed by the name of the anion.
15. To write the formula of a binary ionic compound, write the symbol of the cation
followed by the symbol of the anion. Use subscripts to determine the appropriate ratio of
the cations to anions such that the overall charge of the compound is zero.
17.
a. BeCl2
b. Cs2S
c. NaI
d. SrO
18.
a. Cr(NO2)3
b. NaClO4
c. Mg(HCO3)2
d. Ca(C2H3O2)2
47. All compounds are electrically neutral, so they have zero charge.
49. To determine the charge of a transition metal cation (or any variable charge ion) you
must look at the overall charge of the anion and mathematically calculate the positive
charge needed to make the compounds electrically neutral.
52. Parentheses are used when more than a single polyatomic ion is needed to balance the
formula.
53.
NH4
+
Sn4+
NO3NH4NO3
Ammonium
nitrate
Sn(NO3)4
Tin(IV) nitrate
Fe3+
Fe(NO3)3
Iron(III) nitrate
Mg2+
Mg(NO3)2
Magnesium
nitrate
CO32(NH4)2CO3
Ammonium
carbonate
Sn(CO3)2
Tin(IV)
carbonate
Fe2(CO3)3
Iron(III)
carbonate
MgCO3
Magnesium
carbonate
CNNH4CN
Ammonium
cyanide
Sn(CN)4
Tin(IV) cyanide
Fe(CN)3
Iron(III)
cyanide
Mg(CN)2
Magnesium
cyanide
PO43(NH4)3PO4
Ammonium
phosphate
Sn3(PO4)4
Tin(IV)
phosphate
FePO4
Iron(III)
phosphate
Mg3(PO4)2
Magnesium
phosphate