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| A hydrogen bond is a weak attraction between a hydrogen atom and another atom. |
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| Cohesion is an attraction between molecules of the same sustance. |
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| Adhesion is a force of attraction between different kinds of molecules. |
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| Mixture is material composed of two or more elements or compounds that are physically mixed together but not chemically combined. |
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| A solution is a type of mixture in which all the components are evenly distributed. |
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| A solute is a substance that is dissolved in a solution. |
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| A solvent is a dissolving substace in a solution. |
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| Suspension is mixture of water and nondissolved material. |
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| The pH scale is a scale with values from 0 to 14, used to measure the concentration of H+ ions in a solution; a pH of 0 to 7 is acidic, a pH of 7 is netural, and a pH of 7 to 14 is basic. |
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| A base is a compound that produces hydroxide ions (OH-) in solution; solution with a pH of more than 7. |
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| A buffer is a compound that prevents sharp, sudden changes in pH. |
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| Acid is a compound that forms hydrogen ions (H+) in solution; a solution with a pH of less than 7. |
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