The ammonium ion, NH₄⁺, forms insoluble salts with many compounds when combined with a negatively charged ion. A few of the most common insoluble salts that form with the ammonium ion are the carbonates, sulfates, and phosphates.

Carbonates

The carbonates are probably the most commonly known of the insoluble salts that form with the ammonium ion. Some of the more common carbonate salts with the ammonium ion include: NH₄⁺CO₃, NH₄⁺ 2CO₃, and NH₄⁺MgCO₃. All of these carbonate salts are insoluble in water and will form a white precipitate when combined with an acid.

Sulfates

The sulfates are another group of insoluble salts that will form with the ammonium ion. Some of the more common sulfate salts with the ammonium ion include: NH₄⁺SO₄, NH₄⁺ 2SO₄, and NH₄⁺MgSO₄. All of these sulfate salts are insoluble in water and will form a white precipitate when combined with an acid.

Phosphates

The phosphates are the third group of insoluble salts that will form with the ammonium ion. Some of the more common phosphate salts with the ammonium ion include: NH₄⁺PO₄, NH₄⁺ 2PO₄, and NH₄⁺MgPO₄. All of these phosphate salts are insoluble in water and will form a white precipitate when combined with an acid.

Conclusion

In conclusion, the ammonium ion, NH₄⁺, forms insoluble salts with many compounds when combined with a negatively charged ion. The three main groups of insoluble salts that form with the ammonium ion are the carbonates, sulfates, and phosphates. All of these salts are insoluble in water and will form a white precipitate when combined with an acid.