Question

name the following ionic compounds 17.fe2o3 18.hg2s 19.(nh4)3po4 20.pb(co3)2 21.cr2(c2o4)3

Explanation:

Step1: Identify cations and anions

For $Fe_2O_3$, cation is $Fe^{3 + }$ and anion is $O^{2-}$, name is iron(III) oxide.

Step2: For $Hg_2S$

Cation is $Hg_2^{2+}$ and anion is $S^{2 - }$, name is mercury(I) sulfide.

Step3: For $(NH_4)_3PO_4$

Cation is $NH_4^+$ and anion is $PO_4^{3 - }$, name is ammonium phosphate.

Step4: For $Pb(CO_3)_2$

Cation is $Pb^{4+}$ and anion is $CO_3^{2 - }$, name is lead(IV) carbonate.

Step5: For $Cr_2(C_2O_4)_3$

Cation is $Cr^{3+}$ and anion is $C_2O_4^{2 - }$, name is chromium(III) oxalate.

Answer:

1. Iron(III) oxide
2. Mercury(I) sulfide
3. Ammonium phosphate
4. Lead(IV) carbonate
5. Chromium(III) oxalate