Chemical Reactions

1. A scale used to measure how acidic or basic a solution is.
4. The new substances formed as a result of a chemical reaction.
8. A chemical reaction in which an acid and a base react to form water and a salt, typically resulting in a change in pH.
10. The substances present before a chemical reaction occurs.
13. test for oxygen, relights in the presence of oxygen
15. Elements that are typically shiny, malleable, conductive, and can lose electrons to form positive ions.
16. A substance that changes color to indicate whether a solution is acidic or basic.
17. The part of chemistry that deals with the calculation of reactants and products in chemical reactions.
18. A substance that increases the concentration of hydroxide ions (OH⁻) in a solution and has a pH above 7.
19. The substance in which the solute is dissolved to form a solution.

1. A scientific model used to explain the structure and behavior of matter in terms of particles (atoms or molecules).
2. A test for hydrogen gas, where a burning splint produces a popping sound when exposed to the gas.
3. A solid that forms and settles out of a liquid mixture as the result of a chemical reaction.
5. The amount of a substance (solute) present in a given volume of solution.
6. A substance that is dissolved in a solution.
7. A test for carbon dioxide, where CO₂ is bubbled through limewater (calcium hydroxide), causing it to turn cloudy.
9. A substance that increases the concentration of hydrogen ions (H⁺) in a solution and has a pH below 7.
11. Elements that are not shiny, brittle, poor conductors, and tend to gain electrons to form negative ions.
12. Mixtures of two or more metals, or a metal and another element, which have different physical and chemical properties compared to the individual substances.
14. A process that involves the transformation of reactants into products, often indicated by changes like gas evolution, precipitate formation, or color change.