Naming and Formulas of Bases

The video tutorial covers the process of naming bases, emphasizing the importance of crisscrossing oxidation numbers and using parentheses for polyatomic ions like hydroxide. It provides examples of naming bases such as calcium hydroxide and potassium hydroxide, and explains the use of Roman numerals for elements with variable charges. The tutorial also discusses how to write formulas for bases, including iron hydroxide and magnesium hydroxide, and highlights exceptions in naming conventions.

What is the first step in naming a base?

• Use Roman numerals

• Determine the charge

• Name the element

• Identify the anion

Why are parentheses used in the formula of some bases?

• To indicate a single element

• To show the presence of a polyatomic ion

• To separate the element and hydroxide

• To denote a variable charge

What is the correct name for the base with the formula Ca(OH)2?

• Calcium hydride

• Calcium hydroxide

• Calcium oxide

• Calcium dihydroxide

Which group of elements typically requires Roman numerals in their names?

• Alkali metals

• Alkaline earth metals

• Noble gases

• Transition metals

Which of the following elements does NOT require a Roman numeral in its name?

• Lead

• Iron

• Copper

• Silver

What is the charge of hydroxide in a base?

• +1

• -2

• -1

• +2

How would you write the formula for magnesium hydroxide?

• MgOH2

• Mg2OH

• MgOH

• Mg(OH)2

What is the charge of titanium in titanium(II) hydroxide?

• +1

• +2

• +3

• +4

Which of the following bases does not require parentheses in its formula?

• Iron(III) hydroxide

• Calcium hydroxide

• Sodium hydroxide

• Aluminum hydroxide

What is the correct formula for sodium hydroxide?

• NaO2H

• Na2OH

• Na(OH)2

• NaOH