Question

Hello! I really need help with this.

Name the following salts according to the old -ic, -ous system and the stock system.

a. CrS
b. Cr2O3
c. CrI3 X 6H20
d. CuCl
e. CuI2
f. CuBr2 x 4H20
g. HgCl2
h. Hg2Cl2
i. Fe (OH)3

I am totally lost. I don't know how to name these. I have so many more I need to name, and showing me how to do these would help me so so much!

Answer 1

a. CrS
<b>Cr usually has +2 and +3 (although others are known and fairly common as +6) so CrS is chromous sulfide and part b is chromic oxide.</b>
b. Cr2O3
c. CrI3 X 6H20
<b>This one is chromic iodide hexahydrate.</b>
d. CuCl
e. CuI2
f. CuBr2 x 4H20
<b>Cu usually is +1 or +2 so d is cuprous chloride and e is cupric iodide with f as cupric bromide tetrahydrate</b>
g. HgCl2
h. Hg2Cl2
<b> Hg is +1 or +2 so g is mercuric chloride while h is mercurous chloride</b>
i. Fe (OH)3 <b>This is ferric hydroxide</b>
<b>You can tell the valence of the metal by looking at the anion. For example, FeCl2 and FeCl3 and you know Fe is +2 in the first and +3 in the second. Hg2Cl2. You know Cl is -1 so two of them are -2 which makes Hg2 +2 or +1 for each Hg. </b>

Answer 2

How did you come to solving it?