Chemistry Vocabulary

3. a substance that undergoes a reaction
4. when opposite reactions are occurring at the same rate
5. a substance that speeds up a reaction without being permanently changed
8. the amount of a substance present in a certain volume
10. a substance that slows a reaction down
11. a reaction where one substance breaks down into two or more smaller substances
12. a whole number placed in front of a compound when balancing a reaction
15. unable to dissolve in water
16. when a substance reacts with oxygen to produce one or more oxides
18. a reaction where two or more substances combine to form a new substance
19. a reaction where both positive ions exchange the negative ions they are attached to

1. a substance produced by a reaction
2. the amount of energy particles need when they collide to have a reaction take place
6. a biological catalyst
7. says that if stress is applied to a system in equilibrium the system will shift to relieve the stress
9. occurs when there is no net change between the amounts of products and reactants
13. the reactant present in a lower amount in a reaction
14. a reaction where one ion replaces another in a compound
17. dissolves in water