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Solutions
NYS Chemistry Regents
| Question | Answer |
|---|---|
| Vapor Pressure | the pressure a liquid exerts on its surface, as it tries to become a gas. |
| Parts per million (PPM) | grams solute/grams solution x 1,000,000 |
| Saturated | solution that has as much solute dissolved as is possible for given conditions |
| Supersatured | solution that has more solute dissolved than should be possible at given temp and pressure. |
| Unsaturated | solution that can still have more solute dissolved in it at given conditions. |
| Boiling point elevation & Freezing point depression | Changes in the physical properties of a solution containing a nonvolatile solute. As concentration increases, so does the effect on BP |
| Electrolyte | a solution that conducts electricity because it has charges that can move around. Acids, bases and salts solutions. |
| Miscible | two liquids can make a non-layered (homogeneous) mixture. They’re Mixable! |
| Solute | The substance that gets dissolved when making a solution. (present in smaller amount) |
| Solvent | the chemical that “does the dissolving” the “dissolver” (present in greater amount) |
| Nonelectrolyte | a solution that does NOT conduct electricity because it doesn’t have any charges that can move around. |
| Immiscible | two liquids that cannot mix together. Will always be heterogeneous. |
| Concentration | A measure of how strong a solution is. Calculation by dividing the amount of solute by the amount of solvent. Can be Molarity, PPM, or percent. |
| Dilute | A general term for a concentration that is weak. As a verb, it means to add water to lower the concentration. |
| Colligative Properties | Characteristics of a Solution that depend on the nature and amount of solute dissolved. Vapor pressure reduction, FP depression and BP Elevation are examples. |
| Dissolution (dissolving) | 3 step process: 1. breaking old solute attractions; 2. breaking solvent attractions; 3. solvation |