Solutions Review

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# Solutions Review - PowerPoint PPT Presentation

Solutions Review. How much of the solute will dissolve and how much will remain undissolved at the bottom of the test tube? 60g of N aCl in 100g of water at 60ºc. 40g dissolved 20 g undissolved.

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### Solutions Review

How much of the solute will dissolve and how much will remain undissolved at the bottom of the test tube?60g of NaCl in 100g of water at 60ºc

• 40g dissolved
• 20 g undissolved
Suppose you were making a salt water solution. Sodium ions and chloride ions are separating from one another. What is this called?
• Dissociation
• Allows continual contact between solute & solvent
What is an example of a colloid?
• Aerosols
• Foams
• Emulsions
• Gels/Sols
Explain why a beaker of NaCl crystals cannot conduct an electrical current. Be specific.
• Ions are not dissociated and the ions are not mobile since the are not in a solution
• Solvent
_______ is a substance that dissolves in water to give a solution that conducts electric current
• Electrolyte
• Increases the kinetic energy so molecules are moving faster so more collisions between the solute & solvent
Determine what type of mixture a substance is by the following observation : particles are scattered by light
• Colloid
At 100°C, 70g of NaCl is dissolved in 100g of water. Is this solution saturated or unsaturated?
• Saturated
What is solution equilibrium?
• State where the solute is dissolving at the same rate that the solute is coming out of solution (crystallizing).
_____ is the quantity of solute that will dissolve in specific amount of solvent at a certain temperature.
• Solubility
• Creates more of a surface area on the solute, so more collisions between solute & solvent will occur

Suppose you were making a salt water solution. Sodium ions and chloride ions are each being surrounded by water molecules. What is this called?

• Solvation
_____ is a stable solution in which the maximum amount of solute has been dissolved
• Saturated Solution
• Brownian Motion
Explain why a beaker of NaClwater can conduct an electrical current. Be specific.
• Ions are dissociated and the ions are mobile
Determine what type of mixture A substance is by the following observation : particles can be separated by filtration
• Suspension
_____ is the visible pattern caused by the reflection of light from suspended particles in a colloid
• Tyndall Effect
What is visual evidence that a solution would be saturated?
• Undissolved solute would be present at the bottom of the container
____ is a solution that contains less solute than a saturated solution under existing conditions
• Unsaturated
At 100°C, 10g of NaCl is dissolved in 100g of water. Is this solution saturated or unsaturated?
• Unsaturated
What are 3 factors that affect solubility?
• Nature of solutes/solvents
• Temperature
• Pressure
Explain the rule, “Like Dissolves Like”.
• rule of thumb for predicting whether or not one substance dissolves in another
• Ex: Polar solutes will dissolve in polar solvents
• Aerosols
Describe the 3 steps in the dissolving process.
• Solute-solute attraction is broken up; requires energy
• Solvent-solvent attraction is broken up; requires energy
• Solute-solvent attraction is formed; releases enerty
_____ is a mixture in which the particles are so large that they settle out unless the mixture is constantly stirred or agitated
• suspension
What is an example of a suspension?
• Oil and water
• Dirt and water
_____ is a mixture consisting of particles that are intermediate in size between those in solutions and those in suspensions
• Colloid
_______ is a substance that dissolves in water to give a solution that DOES NOT conduct electric current
• Nonelectrolyte
What is an example of the tyndall effect?
• Visibility of headbeams on a foggy night
_____ is a solution that temporarily contains more than the saturation amount of solute than the solvent can hold (unstable)
• Supersaturated
What is an example of a solution?
• Food coloring and water
• Dissociation
What is the molarity formula? (besides M1V1 = M2V2)
• Molarity = Moles of Solute

Liters of Solution

Explain why a sugar solution cannot conduct an electrical current. Be specific.
• No charged particles are present and they are not mobile