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Chem C12
| Question | Answer |
|---|---|
| What are Heterogeneous mixtures? | Composition not uniform. Ex. Soil and milk |
| What are Homogeneous mixtures? | Uniform throughout. Ex. Salt Water |
| What do solutions have? | Homogeneous mixtures, two or more substances in a single phase, and it is composed of a solute and a solvent. |
| Which one is the solute? | The one with the lesser amount. |
| Which one is the solvent? | The one with the greater amount. |
| What do most solutions deal with? | Water, as the solvent. |
| What are suspensions? | Particles too large to dissolve, as they settle to the bottom. The particles can be filtered out. Ex. Jar of muddy water. |
| What are colloids? | Particles that are small enough to remain dispersed or suspended throughout the solvent. Unfiltered particles. Ex. Liquid emulsion. |
| What is the Tyndall effect? | Light is scattered by colloidal particles in a transparent medium. Ex. Headlights in fog. |
| How to determine whether a solution is an electrolyte or non-electrolyte? | That depends on whether they create ions or molecules in a solution. |
| How to figure if a solution is an electrolyte? | Ionic compounds, and forms ions. |
| How to figure if a solution is a non-electrolyte? | Molecular compounds, and forms molecules. |
| What is an exception? | Highly polar molecular compounds can be electrolytes. |
| What are some factors affecting the rate of dissolution? | Particle size(Crushing a solid solute increase the rate of dissolving, Agitating or stirring, and Heating a solvent |
| Describe Particle size. | Crushing a solid solute increases the rate of dissolution. |
| Describe Agitating or Stirring. | It increases the rate of dissolving, and there is much more contact between solute particles and solvent. |
| Describe Heating a Solvent. | Many substances dissolve quickly in warm water. At higher temperatures, collisions are more frequent at higher energy(More Kinetic Energy) |
| What does the amount of solute dissolved in a given amount depend on? | Nature of solute, nature of solvent, and temperature. |
| What does a saturated solution contain? | Max amount of solute for a given amount of solvent at a given temperature. Also, a state of dynamic equilibrium. |
| What does an unsaturated solution contain? | Less than max amount of solute possible. |
| How about a supersaturated solution? | More solute than theoretically possible. |
| How does this happen? | Warm solution cools slowly, and no dynamic equilibrium exists as there is no undissolved solid. Crystallization can be started by adding a seed crystal. |
| What is the Basic Rule of Solute-Solvent Interactions? | Like dissolves like(Polarity is key) |
| What happens in Solute-Solvent interactions? | Polar substances(ionic compound) will dissolve in polar solvent. Water is polar and therefore a good solvent for ionic compounds. Non polar substances are not soluble in water, but are soluble in gasoline, a non polar solvent. |
| What are some characteristics in Liquid-Liquid Interactions? | Liquids may or may not dissolve in one another. |
| What is Miscible? | Liquids dissolve in each other(H2O and Alcohol) |
| What is immiscible? | Liquids do NOT dissolve in each other(H2O and oil) |
Created by:
pedro5
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