| A | B |
|---|
| suspension | a mixture in which particles can be seen and easily separated by settling or filtration |
| solution | a well mixed mixture. particles are to small to see. boiling water or letting water evaporate will seperate salt solution |
| solvent | the part of a solution present in the largest amount. it dissolves the other substance |
| solute | substance that is present in a solution in a smaller amount and dissolved by the solvent |
| dilute solution | only a little solute is dissolved in the water |
| concentrated solution | has more solute dissolved in the water |
| solubility | a measure of how well a solute can dissolve in a solvent at a given temperature |
| saturated solution | when you have added so much solute that no more dissolves |
| unsaturated solution | when you can continue to dissolve more solute |
| acids | a substance that tastes sour, reats with metals and carbonates, and turns blue litmus paper red |
| corrosive | "eat away" at other materials. acids on metal seems to make the metal dissapear in the solution |
| indicator | a compound that changes color when in contact with an acid or a base. ex. litmus paper |
| base | a substance that tastes bitter, feels slippery and turns red litmus paper blue. also any substance that produces hydrogen ions(OH-) in water |
| hydrogen ion | (H+) an atom of hydrogen that has lost its electron. |
| hydroxide ion | (OH-) a negative ion made of oxygen and hydrogen |
| Ph scale | a range of values from 0-14. it expresses the concentration of hydrogen ions in a solution. acids-lower Ph, high concentration of ions base-higher Ph, low concentration of ions |
| acid rain | more acidic than normal rainwater. Ph can be as low as 4.3, caused by pollutants from industry and motor vehicles |
| neutralization | an acid-base mixture is not as acidic or basic as the individual starting solutions were. Ph of 7 (but not always) |
| salt | any ionic compound made from the neutralization of an acid with a base |
| mechanical digestion | tears, grinds, and mashes large food particles into smaller ones (biting and chewing food) |
| digestion | breaks down the complex molecules of foods into smaller molecules |
| chemical digestion | breaks large molecules into smaller molecules, takes place with help of enzymes |
