Compounds with polyatomic ions

Front

What is a polyatomic ion?

Back

A polyatomic ion is a charged ion composed of two or more atoms covalently bonded, which can act as a single unit in chemical reactions.

Front

What is the formula for sodium phosphate?

Back

Na₃PO₄

Front

What is the formula for calcium nitrate?

Back

Ca(NO₃)₂

Front

What is the formula for iron(II) carbonate?

Back

FeCO₃

Front

What is the formula for aluminum sulfate?

Back

Al₂(SO₄)₃

Front

What is the formula for sodium nitrate?

Back

NaNO₃

Front

How do you determine the formula for an ionic compound?

Back

To determine the formula for an ionic compound, balance the total positive and negative charges of the ions involved.

Front

What is the charge of the sulfate ion (SO₄²⁻)?

Back

The sulfate ion has a charge of -2.

Front

What is the charge of the nitrate ion (NO₃⁻)?

Back

The nitrate ion has a charge of -1.

Front

What is the significance of parentheses in chemical formulas?

Back

Parentheses are used in chemical formulas to indicate that the enclosed group of atoms acts as a single unit, especially when there is a subscript outside the parentheses.