Chemistry General

• What is an accurate result ?


  A result that is close to the true answer
• Define an acid ?


  A substance that releases hydrogen ions in aqueous solution.
• Another term used to describe an acid?

  Proton donor
• Acidic buffer?


  Solution that resists change to the pH by absorbing excess hydrogen ions
• Activation energy = the minimum amount of kinetic energy that particles need to have in order to react when they collide
• What is addition reaction?


  A reaction where two molecules join together to form a single product
• Addition polymer = a type of polymer formed by joining lots of monomers together
• Alicyclic compound ?


  An organic compound that contains carbon and hydrogen joined together in a non-aromatic ring.
• Aliphatic compound?


  An organic compound that contains carbon and hydrogen joined together in straight chains, branched chains or non-aromatic rings.
• Alkali ?


  A base that is soluble in water and releases hydroxide ions in aqueous solution.
• Where are alkali earth metals found in the periodic table?

  Group 2
• What is an anhydrous salt?

  A salt that doesn't contain water of crystallisation.
• What is an anomalous result ?


  A result that doesn't fit in with the pattern of the other results in a set of data.
• What is an antacid ?


  A substance that neutralises stomach acid.
• Aromatic compound?


  An organic compound that contains a benzene ring.
• Define atom economy

  The proportion of reactant atoms that become part of desired product, expressed as a percentage.
• Average bond enthalpy = The energy needed to break one mole of a bond in the gas phase, averaged over the different compounds that the bond is found in.
• What is avogadro's constant ?


  The number of particles in 1 mole of a substance