Common Polyatomic Ions and Naming Patterns

Flashcards covering common polyatomic ions, their chemical formulas, and oxyanion naming rules based on the lecture reference table.

What is the chemical formula for ammonium?

$$NH_4$$

What is the chemical formula for hydronium?

$$H_3O$$

What chemical name corresponds to the formula $OH$?

Hydroxide

What chemical formula represents cyanide?

$$CN$$

What chemical formula represents cyanate?

$$OCN$$

What chemical formula represents thiocyanate?

$$SCN$$

What chemical formula represents peroxide?

$$O_2^{2-}$$

What chemical name corresponds to the formula $CO_3^{2-}$?

Carbonate

What chemical formula represents hydrogen carbonate?

$$HCO_3$$

What chemical name corresponds to the formula $SO_4^{2-}$?

Sulfate

What chemical formula represents hydrogen sulfate?

$$HSO_4$$

What chemical name corresponds to the formula $SO_3^{2-}$?

Sulfite

What chemical formula represents hydrogen sulfite?

$$HSO_3$$

What chemical formula represents thiosulfate?

$$S_2O_3^{2-}$$

What chemical name corresponds to the formula $PO_4^{3-}$?

Phosphate

What chemical formula represents hydrogen phosphate?

$$HPO_4^{2-}$$

What chemical formula represents dihydrogen phosphate?

$$H_2PO_4$$

What chemical name corresponds to the formula $PO_3^{3-}$?

Phosphite

What chemical formula represents nitrate?

$$NO_3$$

What chemical formula represents nitrite?

$$NO_2$$

What are the chemical formulas for hypochlorite, chlorite, chlorate, and perchlorate?

Hypochlorite is $ClO$, chlorite is $ClO_2$, chlorate is $ClO_3$, and perchlorate is $ClO_4$.

What chemical name corresponds to the formula $C_2H_3O_2$?

Acetate

What chemical formula represents oxalate?

$$C_2O_4^{2-}$$

What chemical formula represents chromate?

$$CrO_4^{2-}$$

What chemical formula corresponds to dichromate in the reference table?

$$Cr_2O^{2-}$$

What chemical name corresponds to the formula $MnO_4$?

Permanganate

In oxyanion naming patterns, how does an -ate ion compare to its corresponding -ite ion?

The -ate ion contains more oxygen atoms than the corresponding -ite ion.

For the chlorine, bromine, and iodine oxyanion series, what do the prefixes hypo- and per- indicate?

Hypo- indicates fewer oxygen atoms and per- indicates more oxygen atoms.

What changes occur when hydrogen is added to an oxyanion?

Adding hydrogen changes both its formula and charge.

Which common polyatomic ions are positively charged?

Ammonium and hydronium are positively charged, while most other common polyatomic ions are negatively charged.