Acids and Redox Flashcards

• Acid


  A compound that forms hydrogen ions (H+) in solution.
• Oxidation number of O in peroxides


  -1
• Oxidation number of H in metal hydrides

  -1
• Oxidation number of O bonded to F

  +2
• Oxidation number of Cl- Br- I-

  -1
• Oxidation number of Mg2+ Ca2+

  +2
• Oxidation number of Na+ K+

  +1
• Oxidation number of F -!
• Oxidation number of H

  +1
• Oxidation number of O

  -2
• Oxidation


  Loss of electrons.
• Reduction

  Gain of electrons.
• Redox reaction

  A reaction involving reduction and oxidation.
• Oxidation number


  A measure of the number of electrons that an atom uses to bond with atoms of another element.
• Concordant

  (In context) 2 titration results within 0.10cm3 of each other.
• Titre


  The volume added from the burette when the volume of one solution has exactly reacted with the other solution.
• End point


  The point in a titration at which an indicator changes colour.
• Indicator


  A compound that changes colour in the presence of an acid or a base.
• Burette


  Used for dispensing liquids accurately, especially during titrations.
• Pipette


  Used to accurately measure small amounts of liquid.
• Volumetric flask


  Used for making liquid solutions of precise volumes
• Titration


  A solution of known concentration is used to determine the concentration of another solution.
• Standard solution


  A solution of known concentration
• Concentration

  mol dm-3
• Neutralisation


  A chemical reaction in which an acid and a base react together to produce a salt.
• Salt


  The product of a reaction in which the H+ ions from the acid are replaced by metal or ammonium ions.
• Base


  A compound that neutralises an acid to form a salt.
• Alkali


  A type of base that dissolves in water forming hydroxide ions, OH- (aq) ions.
• Weak acid


  An acid that dissociates only partially in solution.
• Strong acid

  An acid that dissociates fully in solution.