| A | B |
|---|
| Name | Definition |
| substance | a matter that has the same composition and properties throughout |
| mixture | a combination of two or more substances that can be separated by physical means |
| homogeneous mixture | two or more substances that are evenly mixed on the atomic level, but the substances are not bonded together |
| heterogeneous mixture | mixture in which the substances are not evenly mixed |
| solution | a homogeneous mixture |
| solute | the dissolved substance in any solution |
| solvent | the substance that is used to dissolve the solute |
| liquid | matter with a definite volume but no definite shape that can flow from one place to another |
| acid | a substance that releases a positively charged hydrogen ion, H+, in water |
| hydronium ion | is positively charged and has the formula H3O+ |
| base | a substance that produces hydroxide ions when dissolved in water |
| pH | a numerical scale used to indicate how acidic or basic a solution is |
| indicator | a compound that changes from one color to another within a particular pH range |
| pH meter | an electronic instrument with an electrode that is sensitive to the hydronium ions in a solution |
| atom | very small particle that makes up all matter |
