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Assignment #70 Solubility Equilibria. Solubility. Everything Is Soluble The question is to what extent. Degrees of Solubility: Soluble Slightly Soluble Insoluble Negligible Amount. Dissolving Ionic Compounds. Write the equations that depicts solid calcium sulfate dissolving in water.
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Assignment #70Solubility Equilibria Regular Chemistry
Solubility • Everything Is Soluble • The question is to what extent. • Degrees of Solubility: • Soluble • Slightly Soluble • Insoluble • Negligible Amount Regular Chemistry
Dissolving Ionic Compounds • Write the equations that depicts solid calcium sulfate dissolving in water. • CaSO4(s.) Regular Chemistry
Dissolving Ionic Compounds • Write the equations that depicts solid calcium sulfate dissolving in water. • CaSO4(s.) Ca2+(aq.) + SO42-(aq.) • Dissolution • All Reactions Are Reversible • Ca2+(aq.) + SO42-(aq.) CaSO4(s.) • Precipitation • Correct equation for the dissolution of calcium sulfate? Regular Chemistry
Dissolving Ionic Compounds • Write the equations that depicts solid calcium sulfate dissolving in water. • CaSO4(s.) Ca2+(aq.) + SO42-(aq.) • Dissolution • All Reactions Are Reversible • Ca2+(aq.) + SO42-(aq.) CaSO4(s.) • Precipitation • CaSO4(s.) Ca2+(aq.) + SO42-(aq.) Regular Chemistry
Equilibrium • CaSO4(s.) Ca2+(aq.) + SO42-(aq.) • Balance between dissolution and precipitation. • At equilibrium there are ions in solution and undissolved solute present at the same time. • Equilibrium occurs when the solution is saturated. Regular Chemistry
Solubility Product • Equilibrium expression for dissolution. • CaSO4(s.) Ca2+(aq.) + SO42-(aq.) Regular Chemistry
Solubility Product • Equilibrium expression for dissolution. • CaSO4(s.) Ca2+(aq.) + SO42-(aq.) • Ksp is Constant for Solubility Product. • Special type of equilibrium. • At 25.0°C, the maximum concentration of calcium sulfate is 0.0049M. Find Ksp. • Maximum concentration means saturated. In other words, the process is at equilibrium. Regular Chemistry
Solubility Product • Equilibrium expression for dissolution. • CaSO4(s.) Ca2+(aq.) + SO42-(aq.) • Ksp is Constant for Solubility Product. • Special type of equilibrium. • At 25.0°C, the maximum concentration of calcium sulfate is 0.0049M. Find Ksp. • Ksp = 2.4x10-5 Regular Chemistry
Solubility Product • At 25.0°C, 3.27 grams of lead (II) bromide can dissolve in 850 milliliters of solution. Find Ksp. • PbBr2(s.) Regular Chemistry
Solubility Product • At 25.0°C, 3.27 grams of lead (II) bromide can dissolve in 850 milliliters of solution. Find Ksp. • PbBr2(s.) Pb2+(aq.) + 2 Br1-(aq.) • Ksp = 4.6x10-6 Regular Chemistry
Solubility Product • At 25.0°C, find the maximum concentration of silver chloride. • Need Ksp • Table on Page 566 • AgCl(s.) Ag1+(aq.) + Cl1-(aq.) Regular Chemistry
Solubility Product • At 25.0°C, find the maximum concentration of silver chloride. • Need Ksp • Table on Page 566 • AgCl(s.) Ag1+(aq.) + Cl1-(aq.) • 1.3x10-5M Regular Chemistry
Solubility Product • At 25.0°C, what mass of zinc hydroxide can dissolve in 100. milliliters of solution? • Zn(OH)2(s.) Zn2+(aq.) + 2 OH1-(aq.) Regular Chemistry
Solubility Product • At 25.0°C, what mass of zinc hydroxide can dissolve in 100. milliliters of solution? • Zn(OH)2(s.) Zn2+(aq.) + 2 OH1-(aq.) Regular Chemistry
Solubility Product • At 25.0°C, what mass of zinc hydroxide can dissolve in 100. milliliters of solution? • Zn(OH)2(s.) Zn2+(aq.) + 2 OH1-(aq.) • 2.2x10-5g Regular Chemistry
Summary • Everything Is Soluble! • Equilibria Dissolving Ionic Compounds. • Form a Saturated Solution • Dissolution • Precipitation • Solubility Product Regular Chemistry
Tonight's Assignment Regular Chemistry