Solubility Product and Molar Solubility

Professor Dave explains solubility, focusing on the solubility product (Ksp) and its role in determining the solubility of ionic compounds. He discusses how even 'insoluble' compounds dissolve slightly, leading to dynamic equilibrium. The video covers calculating Ksp for various compounds, predicting ion concentrations, and practical applications of these concepts.

What happens to ionic compounds that are water-insoluble when they are placed in water?

• They turn into a liquid.

• They form a gas.

• They remain in the solid phase.

• They dissolve completely.

What does the solubility product (Ksp) represent?

• The total mass of a compound in solution.

• The concentration of a solid in water.

• The product of ion concentrations in solution at equilibrium.

• The rate at which a compound dissolves.

Why are solids not included in the solubility product expression?

• Solids are always present in excess.

• Solids have no effect on equilibrium.

• Solids do not dissolve in water.

• Solids are not part of the equilibrium expression.

How is the solubility product expression for magnesium hydroxide different from that of calcium carbonate?

• It includes a squared term for hydroxide ions.

• It includes a linear term for carbonate ions.

• It includes a squared term for calcium ions.

• It includes a cubed term for magnesium ions.

What is the first step in calculating the Ksp of a compound?

• Calculating the mass of the compound.

• Writing the solubility product expression.

• Measuring the temperature of the solution.

• Determining the pH of the solution.

If the concentration of magnesium ions in a solution is 3.7 x 10^-6 M, what is the concentration of hydroxide ions?

• 2.0 x 10^-13 M

• 1.85 x 10^-6 M

• 3.7 x 10^-6 M

• 7.4 x 10^-6 M

What is the molar solubility of copper one bromide if its Ksp is 6.3 x 10^-9?

• 1.3 x 10^-2 moles per liter

• 4.0 x 10^-6 moles per liter

• 6.3 x 10^-9 moles per liter

• 7.9 x 10^-5 moles per liter

In the ICE chart for calcium hydroxide, what is the change in concentration for hydroxide ions?

• X

• 3X

• 2X

• 4X

How do you determine the molar solubility from the Ksp expression?

• By multiplying the ion concentrations.

• By dividing the Ksp by the ion concentrations.

• By solving for X in the Ksp expression.

• By adding the ion concentrations.

What does a smaller Ksp value indicate about a substance's solubility?

• The substance is more reactive.

• The substance is more soluble.

• The substance is less soluble.

• The substance is more volatile.