Mini-Tests

• The systematic name of NaClO3 is sodium chlorate (V).
• The systematic name of Cr2O3 is chromium (III) oxide.
• The systematic name of Ag2O is silver (I) oxide.
• The acid dissocation constant shows the extent of acid.
• Explain, in terms of bond breaking and bond forming, why a reaction can be exothermic.


  More energy is released by the forming of bonds than energy required to break the bonds.
• State the conditions of temperature and pressure used for standard enthalpy measurements.


  25 degrees celsius/298K and 100kPa/1 atm.
• What is the number of alicyclic structural isomers of C5H10?


  Five.
• Which property explains the low reactivity of alkanes?


  The high C-C bond enthalpy.
• State two limitations of using radical substitution in organic synthesis.


  1. Multiple products are made, so it is less efficient.
  2. You cannot determine where the halogen will bond.
• Explain the trend in boiling points of the halogens.


  The boiling point increases as you go down the group because the molecules increase in size with increased electron density, leading to stronger London forces. This mean more energy is needed to break the London forces, resulting in higher boiling points.
• What is the formula of a ferrate (VI) ion?


  FeO₄²-
• Write the systematic name for NaBrO3.


  Sodium Bromate.