Oxidation Numbers and Calcium Hydroxide

The video tutorial explains how to find oxidation numbers for each element in calcium hydroxide (Ca(OH)2). It begins by noting that Ca(OH)2 is a neutral compound, meaning its oxidation numbers add up to zero. The tutorial then assigns oxidation numbers to calcium (+2), oxygen (-2), and hydrogen (+1) based on standard rules. It verifies these numbers by ensuring they sum to zero, confirming the compound's neutrality. The video concludes with a summary of the correct oxidation numbers for each element in Ca(OH)2.

What is the overall charge of calcium hydroxide?

• Variable

• Negative

• Positive

• Neutral

Which group does calcium belong to in the periodic table?

• Group 1

• Group 2

• Group 4

• Group 3

What is the typical oxidation number of oxygen in compounds?

• -1

• -2

• +1

• +2

When hydrogen is bonded to non-metals, what is its oxidation number?

• -1

• 0

• +2

• +1

How many hydroxide ions are present in calcium hydroxide?

• 1

• 2

• 3

• 4

What is the oxidation number of calcium in calcium hydroxide?

• +4

• +3

• +2

• +1

What is the sum of oxidation numbers in a neutral compound?

• +2

• 0

• +1

• -1

Which element in calcium hydroxide has a positive oxidation number?

• Both Calcium and Hydrogen

• Calcium

• Oxygen

• Hydrogen