Chemical Reactions

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Across
  1. 3. Reaction that involves a substance rapidly combining with oxygen, usually accompanied by a flame; burning
  2. 4. Chemical compound with a pH > 7 that tastes bitter and is soapy to touch
  3. 6. Shorthand way of describing the ratio of elements in a compound or molecule
  4. 8. Solution formed by soluble bases
  5. 11. Reaction that involves the breakdown of a compound into simpler substances; energy in the form of heat or electricity is required to break the bonds in the reactants
  6. 14. Shorthand way of showing what happens to the reactants and products in a chemical reaction
  7. 15. Insoluble compound formed in a precipitation reaction
  8. 17. When solid products ‘fall out’ of solution of ionic substances
  9. 18. When an acid and a base react to neutralise each other and form a salt and water
  10. 19. Chemical substance formed in a reaction between an acid and a base, usually a metal and non-metal combination
Down
  1. 1. Substance that changes colour in the presence of an acid or base
  2. 2. Shorthand way of describing a chemical reaction in words; reactants are on one side of the equation and products on the other
  3. 5. Compound of carbon and hydrogen
  4. 6. Scientific law that states the total mass of the reactants in a chemical reaction always equals the total mass of the products
  5. 7. Base that dissolves in water
  6. 9. Chemical compound with a pH < 7 that tastes sour and contains at least one hydrogen atom
  7. 10. Swapping of ions between two salts in solution
  8. 12. Substance that is neither an acid nor a base; pH = 7
  9. 13. Reaction that involves the oxidation of a substance, usually a metal
  10. 16. Scale that indicates the relative acidity or alkalinity of a solution; ranges from 0 to 14