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chem U9
Water
| Question | Answer |
|---|---|
| intramolecular forces | the attraction between atoms within a molecule |
| intermolecular forces | the attraction between molecules |
| hydrogen bonding | the attraction of a bonded hydrogen atom to an unbonded electron pair on another molecule |
| surface tension | the resistance of a liquid to an increase in surface area |
| cohesive forces | the forces holding the liquid together to present the minimum surface area |
| in water,is the solid phase more or less dense than the liquid phase? | solid phase is LESS dense |
| capillary action | the spontaneous rising of liquid in a narrow tube due to cohesion and adhesion |
| cohesion | |
| adhesion | 2 different things sticking to each other |
| solubility | |
| solute | the thing being dissolved |
| solvent | the one doing the dissolving |
| do solutes dissolve in solvents with similar or opposite polarity? | similar |
| why? | |
| dissocation/ionization | ionic compound splitting apart |
| hydration (solvation) | |
| why might you need more solvent than solute? | the solvent may have slight +/- charges whereas the solute is held together by complete +/- charges |
| hard water | water that has Ca2+, Mg2+, Fe2+ (notice these all are higher than a charge of 1) |
| soft water | water that has Na+ or K+ ions in it (notice how these only have a charge of 1+) |
| where does the solvent start dissolving in terms of the location of the solute? | the edges of the solute |