Common Ions, Acids, and Molecular Compounds

A practice set of flashcards reviewing the chemical formulas and charges of common polyatomic ions, cations, acids, and simple molecules.

What is the chemical formula for the acetate ion?

$CH_3COO^-$ or $C_2H_3O_2^-$

What is the chemical formula for the carbonate ion?

$$CO_3^{2-}$$

What is the chemical formula for the chromate ion?

$$CrO_4^{2-}$$

What is the chemical formula for the cyanide ion?

$$CN^-$$

What is the chemical formula for the dichromate ion?

$$Cr_2O_7^{2-}$$

What is the chemical formula for the bicarbonate (hydrogen carbonate) ion?

$$HCO_3^-$$

What is the chemical formula for the hydroxide ion?

$$OH^-$$

What is the chemical formula for the nitrate ion?

$$NO_3^-$$

What is the chemical formula for the nitrite ion?

$$NO_2^-$$

What is the chemical formula for the permanganate ion?

$$MnO_4^-$$

What is the chemical formula for the phosphate ion?

$$PO_4^{3-}$$

What is the chemical formula for the sulfate ion?

$$SO_4^{2-}$$

What is the chemical formula for the sulfite ion?

$$SO_3^{2-}$$

What is the chemical formula for the aluminum ion?

$$Al^{3+}$$

What is the chemical formula for the ammonium ion?

$$NH_4^+$$

What is the chemical formula for the mercury (I) ion?

$$Hg_2^{2+}$$

What is the chemical formula for the mercury (II) ion?

$$Hg^{2+}$$

What is the chemical formula for the silver ion?

$$Ag^+$$

What is the chemical formula for the zinc ion?

$$Zn^{2+}$$

What is the chemical formula for Hydrochloric Acid?

$$HCl$$

What is the chemical formula for Nitric Acid?

$$HNO_3$$

What is the chemical formula for Sulfuric Acid?

$$H_2SO_4$$

What is the chemical formula for Phosphoric Acid?

$$H_3PO_4$$

What is the chemical formula for Acetic Acid?

$$CH_3COOH$$

What is the chemical formula for Ammonia?

$$NH_3$$

What is the chemical formula for Hydrogen Sulfide?

$$H_2S$$

What is the chemical formula for Methane?

$$CH_4$$

What is the chemical formula for Water?

$$H_2O$$