chemical reaction

1. when there is a fuel with oxygen.
5. you can continue to farm and harvest it and won't run out.
7. iron oxide
10. big name for a type of pH indicator.
13. fuel made from renewable sources.
14. a measurement of the acidity of substances.
17. an acid with a really low pH and really wants to give away it's hydrogen.
19. the wearing down of metals.
22. lots of acid together that hasn't been diluted.
26. something that is bitter, slippery/soapy, reacts with oils and fats and neutralises acids.
30. the official indicator that is used in labs.
31. a reaction that absorbs heat, feels cold to touch, opposite of exothermic.
32. the materials that react with each other to make the product.

2. a base and an acid makes water and what?
3. you cannot farm it and there is a limited source.
4. stains your clothes and can be used as a natural indicator.
6. an acid that doesn't really push to give away its hydrogen, has a pH closer to 7.
8. a reaction that lets out heat, energy, light, and is warm/hot to touch.
9. has citric acid and is very sour.
10. the end result made from the chemical reaction.
11. a base that dissolves in water.
12. gas form of carbon.
15. ethanol, methanol and methane are examples of this.
16. has been mixed with water and is no longer concentrated.
18. made from fermented sugar/ fruit and veg
20. what is it called when iron rusts or copper goes green??
21. acetic acid, used in cooking.
23. anything with a pH of 7 is...
24. something that is sour, reacts with metal, has a pH lower than 7 neutralise bases.
25. acids do to the acidity of a substance when added to a base?
27. a substance that changes colour when added to solutions with different acidities, used to see how acidic things are.
28. something that produces energy, light, heat when it reacts other materials like oxygen.
29. good drink and can be used as a natural indicator.