Unit 4 Vocab

7. a chemical reaction between two compounds where the positive ion of one compound is exchanged with the positive ion of another compound
8. two or more substances combine to form another substance
9. a chemical formula showing the simplest ratio of elements in a compound rather than the total number of atoms in the molecule.
11. tells you by mass what percent of each element is present in a compound
13. a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products
14. a chemical substance, usually a liquid, which contains hydrogen and can react with other substances to form salts.
17. An ionic compound made from the neutralization of an acid with a base.
18. the mass in grams of one mole of a substance
19. a chemical change in which one element replaces a second element in a compound

1. a reaction in which an acid and a base react in aqueous solution to produce a salt and water
2. Tells you the ratio of elements in the compound
3. the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes
4. A substance that decreases the hydrogen ion concentration in a solution.
5. an expression that defines the number of atoms of each element in one molecule of a compound
6. a chemical change in which a single compound is broken down into two or more simpler products
10. a measure of how acidic/basic water is
12. a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat
15. the number in front of the formula
16. The chemical substances which are formed due to a chemical reaction between two or more chemical substances