Calcium Hydroxide Formula Concepts

Dr. B explains how to write the formula for the ternary ionic compound calcium hydroxide. The video covers writing element symbols and charges using the periodic table, identifying the polyatomic ion hydroxide, and balancing ionic charges using the crisscross method. The video concludes with verifying the formula and providing additional resources for further practice.

What is the charge of calcium when writing the formula for calcium hydroxide?

• +2

• +1

• -2

• -1

Where can you find the formula for the polyatomic ion hydroxide?

• Physics Textbook

• Chemical Reactions Book

• Common Ion Table

• Periodic Table

What is the charge of the hydroxide ion?

• -2

• -1

• +2

• +1

Which method is used to balance the charges in calcium hydroxide?

• Substitution Method

• Crisscross Method

• Addition Method

• Multiplication Method

What should be done to the hydroxide ion when using the crisscross method?

• Add a subscript of 2

• Add a subscript of 1

• Remove the charge

• Place in parentheses

What is the net charge of a correctly balanced calcium hydroxide formula?

• 0

• +1

• -1

• +2

How do you verify the correctness of the calcium hydroxide formula?

• Use a calculator

• Ensure charges balance to zero

• Check the periodic table

• Consult a chemistry textbook

What is the final step after balancing the charges in calcium hydroxide?

• Change the element symbols

• Add more ions

• Remove the charges

• Recalculate the charges

What is the purpose of the parentheses in the calcium hydroxide formula?

• To separate elements

• To show a single element

• To denote a charge

• To indicate a polyatomic ion

Where can you find more practice on naming and writing formulas?

• Nominator website

• Physics journal

• Chemistry lab

• Periodic table