SCIENCE FINAL CROSSWORD #1 ACIDS AND BASES

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Across
  1. 2. When a base is mixed with water, it dissociates into a positively charged ion and a hydroxide ion, OH-. A hydroxide ion is a water molecule that has lost a hydrogen ion, H+.
  2. 5. – forms when a solvent is saturated and more solute is added. The extra solute ‘precipitates’ to the bottom. It will not dissolve.
  3. 6. a chemical compound that has a negative or a positive charge
  4. 7. When an acid is mixed with water, it dissociates into a negatively charged ion and a hydrogen ion, H+. Also called hydronium ion (H3O+)
  5. 9. when a less concentrated solution is prepared by adding additional solvent
  6. 12. – heterogenous solution, can see particles easily and can separate them easily. Snow globe.
  7. 13. – when a solvent is ‘full’ of solute and cannot dissolve any more. There are not enough solvent molecules to surround any more solute molecules.
  8. 17. mixture: the same throughout (each scoop has the same amount of each solute and solvent). Salt water, koolade, cake mix without swirls and such…
  9. 18. – well-mixed mixture that contains at least one solute. Particles too small to disperse light so you can see through it. Homogeneous solution. Ex: kool ade, iced tea.
  10. 20. a chemical compound that has a hydrogen ion(s) (also called hydronium ions) when mixed with water (H+ or H3O+)
  11. 21. water solute: salt, oxygen (solid and gas) solvent: water (liquid)
  12. 24. – not able to be dissolved by a particular solvent. Some things can be dissolved by water and some cannot. Oil is insoluble in water.
  13. 25. – ratio of solute and solvent much closer. A strong flavor.
Down
  1. 1. the ratio of the amount of solute to the volume of solvent – Concentration is usually expressed as a certain mass or volume of solute that is dissolved in 1 milliliter, 100 milliliters or in 1 liter.
  2. 3. – a lot more solvent than solute. If flavoring, a weak flavor.
  3. 4. mixture: not the same throughout (each scoop has different amounts of each solute compared to each other and to the solvent). Trail mix, chocolate chip cookies, salad…
  4. 8. - well-mixed mixture that contains at least one solute. Particles too small to see but large enough to scatter light so we can’t see through it. Fog, milk.
  5. 10. solute: sugar and other flavorings in packet (solid) solvent: water
  6. 11. when an acid and a base react to form a water molecule(s) and a salt,
  7. 14. solute: oxygen, water vapor, carbon dioxide… solvent: nitrogen (all gases)
  8. 15. a scale from 0 to 14 that is a measure of the hydrogen and hydroxide ion concentrations, how strong or weak an acid or base is.
  9. 16. – able to be dissolved by a particular solvent
  10. 19. a chemical compound that dissociates into hydroxide ion(s) and a positively charged ion when mixed with water
  11. 22. – the thing that is doing the dissolving. Present in the larger amount. The dissolver. Water is the ‘universal solvent’. Not always a liquid
  12. 23. – the thing that is being dissolved. Present in the lesser amount. Dissolved by the solvent. Is not always a solid! Can be more than one solute in a solution.