Cobalt II Chloride and Solubility

The video discusses the solubility of cobalt II chloride (CoCl2) in water. It explains that CoCl2 is soluble, supported by solubility rules indicating that compounds with chloride ions are generally soluble, with exceptions like silver, lead, and mercury. Cobalt is not an exception. The video further explains the ionic dissociation of CoCl2 in water, where it splits into cobalt ions (Co2+) and chloride ions (Cl-), both of which are aqueous. The video concludes with a brief thank you from Dr. B.

What is the solubility status of cobalt II chloride in water?

• Partially soluble

• Depends on temperature

• Soluble

• Insoluble

Which of the following ions is not an exception to the solubility rule for chlorides?

• Cobalt

• Mercury

• Lead

• Silver

Which of the following is a common exception to the solubility of chlorides?

• Potassium

• Sodium

• Lead

• Cobalt

What charge does the cobalt ion have in cobalt II chloride?

• 1+

• 4+

• 2+

• 3+

When cobalt II chloride dissolves in water, what ions are formed?

• Cobalt ions and oxygen ions

• Cobalt ions and chloride ions

• Cobalt ions and hydrogen ions

• Chloride ions and hydrogen ions

What happens to cobalt II chloride when it is added to water?

• It evaporates

• It remains unchanged

• It forms a precipitate

• It dissociates into ions