Solubility of Cobalt II Hydroxide

The video explores the solubility of cobalt II hydroxide (Co(OH)2) in water, concluding that it is almost insoluble. It reviews solubility rules, noting that most hydroxide salts are only slightly soluble, with exceptions for group 1 and ammonium ions. Data shows cobalt II hydroxide has a solubility of 3.20 mg/L, reinforcing its classification as slightly soluble or nearly insoluble. In chemistry, slightly soluble substances are often treated as insoluble in net ionic equations.

What is the solubility status of Cobalt II Hydroxide in water?

• Insoluble

• Highly soluble

• Soluble

• Moderately soluble

Which group of elements generally forms very soluble hydroxide salts?

• Transition metals

• Group 2 elements

• Noble gases

• Group 1 elements

Which ion is mentioned as being very soluble in the solubility rules?

• Carbonate ion

• Sulfate ion

• Ammonium ion

• Nitrate ion

What is the general solubility characteristic of most hydroxide salts?

• Highly soluble

• Slightly soluble

• Insoluble

• Moderately soluble

What is the solubility of Cobalt II Hydroxide in water according to the data presented?

• 0.32 grams per liter

• 32.0 milligrams per liter

• 3.20 milligrams per liter

• 3.20 grams per liter

What is the significance of the solubility data presented for Cobalt II Hydroxide?

• It indicates it is moderately soluble

• It supports the classification as slightly soluble

• It shows it is insoluble

• It confirms it is highly soluble

How is 'slightly soluble' often treated in net ionic equations?

• As moderately soluble

• As highly soluble

• As insoluble

• As soluble