7184550
Description
Flashcards by Kimberlee Hernandez, updated more than 1 year ago
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Created by Kimberlee Hernandez
almost 8 years ago
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| Question | Answer |
| Polar Covalent bonds | One has stronger pull than the other - partial (+) partial (-) I.e. H-O |
| Nonpolar Covalent bonds | Equal pull |
| Covalent bonds | Sharing of electrons |
| Ionic bonds | Takes or gives electrons |
| Hydrogen bonds | Between partially positive HYDROGEN and partially negative OXYGEN or NITROGEN |
| Van der Waals forces | Small, transient attraction between slight opposite charges (geckos feet) |
| Hydrogen bonds create ... | Surface tension like bugs on water |
| High specific heat | -takes a lot of energy to disrupt hydrogen bonds -resists temperature changes -acts as thermal buffers (in organisms, and for the earth) |
| Evaporative cooling | Water molecules take large amounts of energy when it evaporates |
| Water is more/less dense as a solid, and how? | Less, because ice floats in water |
| Acids | Release H+ ions (0-6.9 = acidic) |
| Bases | Takes up H+ ions (7.1+ = basic) |
| Buffers and ph change | Resist ph change -by accept H+ ions when they're in excess and donate H+ when they are depleted. |
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