Holt Modern Biology chapter 2 section 3
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20 terms
Terms | Definitions |
|---|---|
 polar molecule | a molecule with a positive and a negatively charged end. water is an example |
| hydrogen bond | the type of bond that links water molecules together |
| cohesion | when water molecules attract other water molecules. this property creates surface tension |
| adhesion | the attractive force between two different substances. this causes a meniscus in a glass graduated cylinder |
| solution | solvent and solute together make up this substance |
| solute | the substance dissolved in the solvent |
| solvent | the substance in which the solute is dissolved |
| aqueous solution | a solution in which water is the solvent |
| saturated solution | a solution in which no more solute can be added |
| hydroxide ion | name this ion OH- |
| hydrogen ion | name this ion H+ |
| acid | a solution in which the hydrogen ion concentration is greater than the hydroxide ion concentration |
| base | a solution in which the hydroxide ion concentration is greater than the hydrogen ion concentration |
| neutral solution | a solution in which the hydrogen and hydroxide ion concentrations are in equal amounts |
| pH scale | the scale used for measuring acids and bases |
| buffers | a solution that resists changes in pH when an acid or base is added |
| concentration | the amount of solute in a fixed amount of solution |
| acids | hydrochloric, sulfuric and nitric are all examples of strong ______________ |
| alkaline | another word used for base |
| acid rain | precipitation with a low pH generally less than 5.6 |
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