Question

• please submit your answers on a separate sheet of paper. you do not need to write out the question.

1. cations are ____________ ions, and anions are ____________ ions.
2. in naming binary ionic compounds (bics), we always name the ______________ second.
3. give the name of each of the following simple type i binary ionic compounds (bics).

a. lii
b. mgf₂
c. sro
d. albr₃
e. cas
f. na₂o

1. in each of the following, identify which names are incorrect for the given formulas, and give the correct name.

a. cucl₂, copper(i) chloride
b. ag₂o, silver oxide
c. li₂o, lithium oxide
d. cas, calcium(ii) sulfide
e. ce₂s, cesium sulfide
f. na₂s, disodium sulfide

1. write the names of each of the following binary ionic substances, using the -ous or -ic endings to indicate the charge of the cation.

a. cocl₂
b. crbr₃
c. pbo
d. sno₂
e. co₂o₃
f. fecl₃

Explanation:

1. Cations are positively - charged ions formed by losing electrons, and anions are negatively - charged ions formed by gaining electrons.
2. In naming binary ionic compounds, the anion is named second.
3. For simple Type I binary ionic compounds, we name the metal first and then the non - metal with the ending changed to 'ide'.
4. We check the oxidation states of metals in the compounds to correct the names. For metals with fixed oxidation states, no Roman numerals are needed, and for those with variable oxidation states, we use Roman numerals to indicate the charge.
5. For metals with variable oxidation states, we use the '-ous' (for lower oxidation state) or '-ic' (for higher oxidation state) endings to indicate the charge of the cation.

Answer:

1. Positively - charged; negatively - charged
2. Anion

3.
a. Lithium iodide
b. Magnesium fluoride
c. Strontium oxide
d. Aluminum bromide
e. Calcium sulfide
f. Sodium oxide
4.
a. Incorrect. Correct name: Copper(II) chloride
b. Correct
c. Correct
d. Incorrect. Correct name: Calcium sulfide
e. Incorrect. Correct name: Cerium(III) sulfide
f. Incorrect. Correct name: Sodium sulfide
5.
a. Cobalt(II) chloride
b. Chromium(III) bromide
c. Lead(II) oxide
d. Tin(IV) oxide
e. Cobalt(III) oxide
f. Iron(III) chloride