Across
- 2. equation showing only the ions that change in a reaction
- 4. technique to separate an insoluble solid from a liquid
- 6. substance that forms hydrogen ions (h⁺) in water and donates protons
- 11. mixture of indicators showing a full range of ph colours
- 12. process that releases heat to the surroundings
- 13. chemical reaction written with words instead of formulas
- 20. symbol equation with equal numbers of each atom on both sides
- 22. pictogram used to warn about chemical dangers
- 23. able to dissolve in a solvent like water
- 24. method to obtain pure crystals of a dissolved salt by evaporation and cooling
- 26. not able to dissolve appreciably in a solvent
- 28. reaction of an acid with a base forming a salt and water
- 29. acid that only partially ionises in water
- 32. calcium hydroxide solution used to test for carbon dioxide
- 33. test for hydrogen gas using a lit splint to hear a pop
- 35. basic oxide reacting with acids to form a salt and water
- 37. alkali that only partially dissociates to release oh⁻ ions
- 39. ionic compound formed when the h⁺ of an acid is replaced by a metal or ammonium ion
- 41. dye that changes colour depending on acidity or alkalinity
- 42. bubbling observed when a gas such as carbon dioxide is produced
- 43. chemical that causes inflammation or discomfort on contact
- 44. technique to find concentration by reacting with a standard solution
- 45. h⁺ ion responsible for acidity in aqueous solutions
- 46. oh⁻ ion responsible for alkalinity in aqueous solutions
Down
- 1. carbon-based acid like ethanoic acid that partially ionises in water
- 3. common weak alkali nh₃ used to make ammonium salts
- 5. substance that neutralises excess stomach acid
- 7. chemical that can destroy living tissue or materials
- 8. compound containing the co₃²⁻ ion that reacts with acids to give co₂
- 9. solution with a relatively small amount of solute per volume
- 10. indicator red in acid, orange near neutral, and yellow in alkali
- 14. point where acid and base have reacted in exact stoichiometric amounts
- 15. a base that dissolves in water to give hydroxide ions (oh⁻)
- 16. formation of an insoluble solid during a reaction
- 17. chemical reaction written using chemical formulas
- 18. guidelines predicting whether common salts are soluble or insoluble
- 19. numerical scale from 0 to 14 showing acidity or alkalinity, with 7 as neutral
- 21. simple indicator turning red in acid and blue in alkali
- 25. describes a solution with ph 7 and equal amounts of h⁺ and oh⁻
- 27. acid that fully ionises in water
- 30. substance that reacts with an acid by accepting h⁺ ions
- 31. alkali that fully dissociates to release oh⁻ ions
- 34. base or alkali that reacts with acids to form a salt and water
- 35. inorganic acid such as hydrochloric, sulfuric, or nitric acid
- 36. nh₄⁺ ion found in salts formed with acids
- 38. stage where the indicator shows the titration is complete
- 40. solution with a relatively large amount of solute per volume
- 42. process of removing solvent by heating to leave dissolved solids