Magnesium Hydroxide and Ionic Compounds

The video tutorial explains how to write the chemical formula for magnesium hydroxide. It begins by identifying magnesium and hydroxide ions, highlighting their charges. The tutorial then describes the nature of ionic compounds and the importance of balancing charges to achieve a neutral compound. The crisscross method is introduced as a technique to determine the correct subscripts for the formula. Finally, the video verifies the formula and concludes with the correct representation of magnesium hydroxide as Mg(OH)2.

What is the symbol for magnesium on the periodic table?

• Md

• Ma

• Mn

• Mg

What is the charge of the hydroxide ion?

• 1+

• 2-

• 1-

• 2+

Why is magnesium hydroxide considered an ionic compound?

• It contains only metals.

• It contains only non-metals.

• It contains no charged particles.

• It contains both metals and non-metals.

What is the ionic charge of magnesium in group two of the periodic table?

• 1+

• 2+

• 1-

• 2-

What method is used to balance the charges in magnesium hydroxide?

• Addition method

• Substitution method

• Crisscross method

• Cross-multiplication method

In the crisscross method, what happens to the charges?

• They are ignored.

• They are swapped and used as subscripts.

• They are subtracted.

• They are added together.

Why do we use parentheses around the hydroxide ion in the formula?

• To indicate it is a metal.

• To show it is a polyatomic ion.

• To separate it from magnesium.

• To make it look neat.

What is the final formula for magnesium hydroxide?

• MgOH

• MgOH2

• Mg2OH

• Mg(OH)2

How do we verify the correctness of the magnesium hydroxide formula?

• By ensuring the charges balance to zero.

• By checking the color of the compound.

• By comparing it to another compound.

• By measuring the weight of the compound.

What is the net charge of a neutral compound like magnesium hydroxide?

• 2-

• 0

• 1+

• 1-