| Term | Definition |
|---|
| polar molecule | a molecule in which opposite ends have opposite electrical charges; example is a water molecule |
| hydrogen bond | a weak attraction between the hydrogen atom of one molecule and a slightly negative atom of another molecule |
| cohesion | same molecules sticking to each other by hydrogen bonds |
| adhesion | different molcules sticking to each other by hydrogen bonds |
| solution | a uniform mixture of two or more substances such as salt dissolved in water |
| solute | the substance being dissolved |
| solvent | the substance doing the dissolving |
| aqueous solution | a solution where the solvent is water |
| acid | a substance that donates hydrogen ions (H+); pH less than 7 |
| base | a substance that donates hydroxyl ions (OH-) or removes hydrogen ions (H+); pH greater than 7; also called alkaline |
| pH scale | used to describe how acidic or basic a substance is; goes from 0 to 14 |
| buffer | a substance that causes a solution to resist changes in pH |
| density | a given mass per given volume; is lower in ice than in water |
| specific heat capacity | amount of heat necessary to raise a gram of a substance 1 degree Celsius; is high in water |
| surface tension | cohesion of water molecules where water and air meet; forms a skin that a small insect can stand on |
| neutral | the amount of hydrogen ions equals the amount of hydroxyl ions; pH is 7 |
| litmus paper | a substance used to determine if a solution is acidic or basic; turns red if acidic; turns blue if basic or alkaline |
Combine with other sets
Share on Facebook
Share on MySpace