Ch 6/7 Vocab

1. a compound that changes color in the presence of an acid or a base
3. a well-mixed mixture contain a solvent and at least one solute that has the same properties throughout
4. a biological catalyst that lowers the activation energy of reactions in cells
7. material that releases energy when it burns
8. a substance formed as a result of a chemical reaction
9. a solid that forms from a solution during a chemical reaction
11. an ionic compound made from the neutralization of an acid with a base
12. a rapid reaction between oxygen and fuel that results in fire
13. equation, a short, easy way to show a chemical reaction using symbols
14. a mixture containing small, undissolved particles that do not settle out
16. a reaction of an acid with a base, yielding a solution that is not as acidic or basic as the starting solutions were
20. a material that increases the rate of a reaction by lowering the activation energy
22. substance that undergoes change in a chemical reaction
24. scale, a range of values used to express the concentration of hydrogen ions in a solution
25. the amount of one material in a certain volume of another material
27. a mixture in which the particles can be seen
28. a substance that tastes sour, reacts with metals and carbonates, and turns blue litmus red
29. a substance that tastes bitter, feels slippery, and turns litmus paper blue

2. of matter, the principle stating that matter is not created or destroyed during a chemical reaction
3. the part of a solution that is present in the largest amount and dissolves a solute
5. a reaction in which one element replaces another in a compound or when two elements in different compounds trade places
6. a number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction
10. the way in which acids react with some metals so as to eat away the metal
13. the study of properties of matter and how matter changes
15. energy, the minimum amount of energy needed to get a chemical reaction started
16. a word used to describe a solution with a pH of 7
17. anything that has mass and takes up space
18. the part f a solution present in a lesser amount and dissolved by the solvent
19. a chemical reaction in which two or more simple substances combine to form a new, more complex substance
21. chemical reaction that breaks down compounds into simpler products
23. a measure of how much solute can dissolve in a solvent at a given temperature
26. a material that decreases the rate of a reaction