click below
click below
Normal Size Small Size show me how
Water & Solutions
2.3 Terms
| Term | Definition |
|---|---|
| polar | describes a molecule with opposite charges on opposite ends |
| hydrogen bond | the intermolecular force occurring when a hydrogen atom that is bonded to a highly electronegative atom of one molecule is attracted to two unshared electrons of another molecule |
| cohesion | the force that holds molecules of a single material together |
| adhesion | the attractive force between two bodies of different substances that are in contact with each other |
| capillarity | the attraction between molecules that results in the rise of a liquid in small tubes |
| solution | a homogenous mixture throughout which two or more substances are uniformly dispersed |
| solute | in a solution, the substance that dissolves in the solvent |
| solvent | in a solution, the substance in which the solute dissolves |
| concentration | the amount of a particular substance in a given quantity of a mixture, solution, or ore |
| saturated solution | a solution that cannot dissolve any more solute under the given conditions |
| aqueous solution | a solution in which water is the solvent |
| hydroxide ion | the OH ion |
| hydronium ion | an ion consisting of a proton combined with a molecule of water |
| acid | any compound that increases the number of hydronium ions when dissolved in water; acids turn blue litmus paper red and react with bases and some metals to form salts |
| base | any compound that increases the number of hydroxide ions when dissolved in water; bases turn red litmus paper blue and react with acids to form salts |
| pH scale | a range of values that are used to express the acidity or alkalinity (basicity) of a system; each whole number on the scale indicates a tenfold change in acidity; a pH of 7 is neutral, a pH of less than 7 is acidic, and a pH of greater than 7 is basic |
| buffer | a solution made from a weak acid and its conjugate base that neutralizes small amount of acids or bases added to it |