Ionic Compounds and Hydroxide Ions

The video tutorial explains how to write the chemical formula for sodium hydroxide (NaOH). It begins by identifying sodium as a metal and hydroxide as a polyatomic ion. The tutorial guides viewers to find sodium's symbol (Na) and charge (+1) on the periodic table, and hydroxide's formula (OH-) from a list of common polyatomic ions. It emphasizes the importance of balancing the charges in ionic compounds, resulting in the formula NaOH. The video concludes with a suggestion to visit breslin.org for more practice in naming and writing chemical formulas.

What type of ion is hydroxide considered to be?

• A polyatomic ion

• A transition metal

• A metal ion

• A noble gas

What is the symbol and charge of sodium?

• K, +1

• S, +1

• Na, +1

• Na, -1

Which of the following is the correct representation of the hydroxide ion?

• OH-

• OH+

• O2-

• H2O

Why is it important to balance the charges in an ionic compound?

• To increase the compound's weight

• To make the compound colorful

• To ensure the compound is stable

• To decrease the compound's melting point

What is the correct chemical formula for sodium hydroxide?

• NaOH

• NaO2

• NaH

• Na2O