Writing ionic formulas

Front

What is an ionic formula?

Back

An ionic formula represents the ratio of ions in a compound, showing the total number of positive and negative charges that balance each other.

Tags

NGSS.HS-PS1-3

Front

How do you determine the formula for calcium phosphate?

Back

The formula for calcium phosphate is Ca3(PO4)2, derived from the charges of calcium (Ca^2+) and phosphate (PO4^3-).

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Front

What is the charge of a calcium ion?

Back

The charge of a calcium ion (Ca) is +2.

Front

What is the charge of a phosphate ion?

Back

The charge of a phosphate ion (PO4) is -3.

Front

How do you write the formula for H+ and S2-?

Back

The formula is H2S, balancing the +1 charge of H+ with the -2 charge of S2-.

Front

What is the formula for manganese(III) oxide?

Back

The formula for manganese(III) oxide is Mn2O3.

Front

What is the charge of a manganese(III) ion?

Back

The charge of a manganese(III) ion (Mn) is +3.

Front

How do you write the formula for calcium arsenide?

Back

The formula for calcium arsenide is Ca3As2, balancing the +2 charge of Ca with the -3 charge of As.

Front

What is the charge of an arsenide ion?

Back

The charge of an arsenide ion (As) is -3.

Front

What is the significance of subscripts in ionic formulas?

Back

Subscripts indicate the number of each type of ion in the compound, ensuring charge balance.