Hydrates and Polyatomic Ions

This video tutorial explains how to name the compound C4.5 H2O by breaking it into two parts: CuSO4 and the hydrate component. It covers the naming of CuSO4 by identifying copper as a transition metal and sulfate as a polyatomic ion. The video also explains how to determine the charge on copper and the use of Roman numerals. It then discusses hydrates, explaining the significance of the dot in the formula and how to use prefixes to name the number of water molecules, such as 'Penta' for five. The tutorial concludes with the full name: Copper(II) Sulfate Pentahydrate.

What is the first step in naming the compound C4.5 H2O?

• Divide the compound into CuSO4 and 5 H2O

• Determine the charge on copper

• Identify the number of water molecules

• Memorize the periodic table

Which element is identified from the periodic table for CuSO4?

• Copper

• Oxygen

• Hydrogen

• Sulfur

What is the name of the polyatomic ion SO4?

• Sulfide

• Sulfuric

• Sulfite

• Sulfate

Why is it important to determine the charge on copper in CuSO4?

• To determine the color of the compound

• To use the correct Roman numeral

• To identify the metal

• To find the number of water molecules

What charge does the sulfate ion (SO4) typically have?

• 3-

• 2+

• 2-

• 1-

How is the charge on copper indicated in the name of the compound?

• By using a prefix

• By using a subscript

• By using a suffix

• By using a Roman numeral

What does the dot in the chemical formula C4.5 H2O indicate?

• An ionic compound

• A transition metal

• A hydrate

• A chemical bond

What prefix is used to indicate five water molecules in a hydrate?

• Deca

• Tetra

• Penta

• Hexa

If a compound has six water molecules, what would the hydrate be called?

• Pentahydrate

• Monohydrate

• Hexahydrate

• Decahydrate