Solubility of Metal Oxides

The video explores whether magnesium oxide (MgO) is soluble in water. It begins by introducing the question and then reviews solubility rules, noting that oxides are generally insoluble except for sodium and potassium. A solubility chart is used to confirm that MgO is insoluble, although a very small amount may dissolve. The video concludes by reiterating that MgO is insoluble in water.

What is the general rule for the solubility of oxides in water?

• Only magnesium oxide is insoluble.

• Oxides are generally insoluble, except for sodium and potassium.

• All oxides are soluble.

• Oxides are always soluble in water.

Which of the following metal oxides is soluble in water?

• Potassium oxide

• Calcium oxide

• Aluminum oxide

• Magnesium oxide

According to the solubility chart, what is the solubility status of magnesium oxide?

• Slightly soluble

• Insoluble

• Highly soluble

• Soluble

Which metal oxide is mentioned as slightly soluble?

• Sodium oxide

• Calcium oxide

• Potassium oxide

• Magnesium oxide

What is the solubility status of sodium oxide in water?

• Insoluble

• Slightly soluble

• Not mentioned

• Soluble

What is the conclusion about the solubility of magnesium oxide in water?

• It is highly soluble.

• It is insoluble, but a small amount may dissolve.

• It is completely insoluble.

• It is soluble in large amounts.