Question

write the compound name for the following formulas. * = polyvalent

1. mg(cro₄)
2. mg(oh)₂
3. k(hco₃)
4. hg₃(po₄)₂*
5. pb(co₃)*
6. sr₃(po₄)₂
7. ca(no₃)₂
8. cr(no₃)₂*
9. ni(hco₃)₂*
10. k₃(po₄)
11. ag₃(po₄)
12. (nh₄)₂(so₄)
13. zn(no₃)₂
14. ni(cro₄)*
15. fe₂(cro₄)₃*

Explanation:

Step1: Analyze Formula 1: \( \text{Mg(CrO}_4\text{)} \)

• Identify cation: Mg (magnesium, charge \( +2 \)).
• Identify anion: \( \text{CrO}_4^{2-} \) (chromate, charge \( -2 \)).
• Combine: Magnesium Chromate.

Step2: Analyze Formula 2: \( \text{KHCO}_3 \)

• Cation: K (potassium, \( +1 \)).
• Anion: \( \text{HCO}_3^- \) (bicarbonate, \( -1 \)).
• Combine: Potassium Bicarbonate.

Step3: Analyze Formula 3: \( \text{Pb(CO}_3\text{)}_* \) (Polyvalent, assume \( \text{Pb}^{2+} \) here)

• Cation: Pb (lead, \( +2 \)).
• Anion: \( \text{CO}_3^{2-} \) (carbonate, \( -2 \)).
• Combine: Lead(II) Carbonate.

Step4: Analyze Formula 4: \( \text{Ca(NO}_3\text{)}_2 \)

• Cation: Ca (calcium, \( +2 \)).
• Anion: \( \text{NO}_3^- \) (nitrate, \( -1 \)), two nitrates.
• Combine: Calcium Nitrate.

Step5: Analyze Formula 5: \( \text{Ni(HCO}_3\text{)}_2^* \) (Polyvalent, \( \text{Ni}^{2+} \))

• Cation: Ni (nickel, \( +2 \)).
• Anion: \( \text{HCO}_3^- \) (bicarbonate, \( -1 \)), two bicarbonates.
• Combine: Nickel(II) Bicarbonate.

Step6: Analyze Formula 6: \( \text{Ag}_3\text{PO}_4 \)

• Cation: Ag (silver, \( +1 \)), three silvers.
• Anion: \( \text{PO}_4^{3-} \) (phosphate, \( -3 \)).
• Combine: Silver Phosphate.

Step7: Analyze Formula 7: \( \text{Zn(NO}_3\text{)}_2 \)

• Cation: Zn (zinc, \( +2 \)).
• Anion: \( \text{NO}_3^- \) (nitrate, \( -1 \)), two nitrates.
• Combine: Zinc Nitrate.

Step8: Analyze Formula 8: \( \text{Fe}_2(\text{CrO}_4\text{)}_3^* \) (Polyvalent, \( \text{Fe}^{3+} \))

• Cation: Fe (iron, \( +3 \)), two irons.
• Anion: \( \text{CrO}_4^{2-} \) (chromate, \( -2 \)), three chromates.
• Combine: Iron(III) Chromate.

Step9: Analyze Formula 9: \( \text{Mg(OH)}_2 \)

• Cation: Mg (magnesium, \( +2 \)).
• Anion: \( \text{OH}^- \) (hydroxide, \( -1 \)), two hydroxides.
• Combine: Magnesium Hydroxide.

Step10: Analyze Formula 10: \( \text{Hg}_3(\text{PO}_4\text{)}_2^* \) (Polyvalent, \( \text{Hg}^{2+} \) here, or \( \text{Hg}_2^{2+} \)? Wait, \( \text{Hg}_3(\text{PO}_4)_2 \): Let's check charges. \( \text{PO}_4^{3-} \), two phosphates: \( 2 \times (-3) = -6 \). Three Hgs: total \( +6 \), so each Hg \( +2 \). So Mercury(II) Phosphate.

Step11: Analyze Formula 11: \( \text{Sr}_3(\text{PO}_4\text{)}_2 \)

• Cation: Sr (strontium, \( +2 \)), three strontiums.
• Anion: \( \text{PO}_4^{3-} \) (phosphate, \( -3 \)), two phosphates.
• Combine: Strontium Phosphate.

Step12: Analyze Formula 12: \( \text{Cr(NO}_3\text{)}_3^* \) (Polyvalent, \( \text{Cr}^{3+} \))

• Cation: Cr (chromium, \( +3 \)).
• Anion: \( \text{NO}_3^- \) (nitrate, \( -1 \)), three nitrates.
• Combine: Chromium(III) Nitrate.

Step13: Analyze Formula 13: \( \text{K}_3\text{PO}_4 \)

• Cation: K (potassium, \( +1 \)), three potassiums.
• Anion: \( \text{PO}_4^{3-} \) (phosphate, \( -3 \)).
• Combine: Potassium Phosphate.

Step14: Analyze Formula 14: \( (\text{NH}_4\text{)}_2\text{SO}_4 \)

• Cation: \( \text{NH}_4^+ \) (ammonium, \( +1 \)), two ammoniums.
• Anion: \( \text{SO}_4^{2-} \) (sulfate, \( -2 \)).
• Combine: Ammonium Sulfate.

Step15: Analyze Formula 15: \( \text{Ni(CrO}_4\text{)}^* \) (Polyvalent, \( \text{Ni}^{2+} \), \( \text{CrO}_4^{2-} \))

• Cation: Ni (nickel, \( +2 \)).
• Anion: \( \text{CrO}_4^{2-} \) (chromate, \( -2 \)).
• Combine: Nickel(II) Chromate.

Answer:

1. Magnesium Chromate
2. Potassium Bicarbonate
3. Lead(II) Carbonate
4. Calcium Nitrate
5. Nickel(II) Bicarbonate
6. Silver Phosphate
7. Zinc Nitrate
8. Iron(III) Chromate
9. Magnesium Hydroxide
10. Mercury(II) Phosphate
11. Strontium Phosphate
12. Chromium(III) Nitrate
13. Potassium Phosphate
14. Ammonium Sulfate
15. Nickel(II) Chromate