Zinc Hydroxide Solubility Concepts

The video explores whether zinc hydroxide (Zn(OH)2) is soluble in water. It is slightly soluble, meaning a small amount dissolves. The solubility rules suggest most hydroxide salts are slightly soluble, with exceptions, but zinc is not one of them. A solubility chart indicates zinc hydroxide is insoluble, creating a conflict with the rules. The video suggests practical testing to observe solubility, concluding that zinc hydroxide is slightly soluble.

What is the solubility status of zinc hydroxide in water?

• Completely insoluble

• Highly soluble

• Slightly soluble

• Insoluble

According to solubility rules, how are most hydroxide salts classified?

• Insoluble

• Completely insoluble

• Slightly soluble

• Highly soluble

Why is zinc hydroxide considered slightly soluble according to solubility rules?

• It is an exception to the rules

• It forms a complex ion

• It is a hydroxide salt

• It reacts with water

What does the solubility chart indicate about zinc hydroxide?

• It is highly soluble

• It is slightly soluble

• It is insoluble

• It forms a precipitate

What conflict arises between the solubility chart and the solubility rules for zinc hydroxide?

• The chart shows it as insoluble, while rules suggest it is slightly soluble

• The chart shows it as highly soluble, while rules suggest it is insoluble

• The chart and rules both show it as insoluble

• The chart and rules both show it as highly soluble

In net ionic equations, how are 'slightly soluble' and 'insoluble' treated?

• As unrelated terms

• As different terms

• As the same term

• As opposites

What is one practical method to test the solubility of zinc hydroxide?

• Heating it

• Mixing it with acid

• Dissolving it in water

• Reacting it with a base

What would you expect to observe if zinc hydroxide is placed in water?

• It dissolves completely

• It does not dissolve at all

• A small amount dissolves

• It reacts violently

What is the significance of testing zinc hydroxide's solubility practically?

• To measure pH changes

• To confirm theoretical predictions

• To create a new compound

• To observe a chemical reaction

Who is the presenter of the video?

• Dr. D

• Dr. C

• Dr. B

• Dr. A