Davidphilippe

Electronic configuration


[[Media:Electronic_config.pdf|Electronic configuration]] : Notes for topic covered on Wednesday 17thFebruary 2010.

[[Media:ELECTRONIC_CONFIGURATIONS.pdf|Electronic configuration]] : Print out version notes for topic covered on Wednesday 17thFebruary 2010.

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First Ionisation Energy
[[Media:Ionisation_energy.pdf|First ionisation energy]] : Notes for topic covered on Wednesday 24thFebruary 2010.

[[Media:IONISATION_ENERGIES.pdf|First ionisation energy]] : Print out version notes for topic covered on Wednesday 24thFebruary 2010.

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Ionic bonding
[[Media:Ionicb.pdf|IONIC BONDING]] : Print out version notes for topic covered on Wednesday 2n2March 2010.

[[Media:Click_here.swf|CLICK HERE]] to view an animation on Fajan's Rule

Covalent bonding
Table of content for covalent bonding 1.0 The notes and animations on Covalent bonding can be seen on the Covalent page

1.1 Shapes of molecules

Polar and non polar molecules
[[Media:Polar.pdf|Click Here]] to view the notes on polar and non polar molecules

Intermolecular Forces
[[Media:INTERMOLECULAR_FORCE1.pdf|Click Here]] for the notes on intermolecular forces.

For more information on Van der Waal's and permanent dipole interactions | click here For more information on Hydrogen bonding| click here

Chemical Energetics
Click here for the notes on chemical energetics

Rate of Reaction
[[Media:Determining_rate_of_reaction.pdf|click here]] for the questions on Rate of reaction

A SIMPLE KINETICS PLAN

Hydrogen peroxide decomposes in the presence of metal oxide catalysts to form oxygen and water according to the following equation.

2H2O2 --&gt; 2H2O  +  O2

You are required to plan an experiment to compare which of two metal oxides is the more effective catalyst by measuring the amount of oxygen formed during a 2 minute period immediately after a solution of hydrogen peroxide is added to a catalyst.

(a) Determine a suitable number of moles of hydrogen peroxide to be used in the experiment. (5)

(b) Suggest a suitable volume and concentration of hydrogen peroxide for the experiment. (3)

(c) Outline the procedure in full, giving details of any apparatus used. (10)

(d) Indicate any hazards or safety precautions specific to the experiment. (2)

(Total 20 marks)

Organic Chemistry
Click here For the notes on Organic Chemistry

Practical Enthalpy of solution
[[Media:Enthalpy_solution_practical.pdf|Click here]] for question

Chemical Calculation
[[Media:Concentration.pdf|Practice Questions]] and for the Answers click here

Questions on Titrations from practical papers

Chemical Equilibria
[[Media:Kc.pdf|Click here]] for questions on Kc'''

[[Media:Kp.pdf|Click here]] for questions on Kp'''

[[Media:buffer.pdf|Click here]] for questions on buffer solutions'''

Questions NMR
[[Media:questions_NMR.pdf|Click here]] for questions on NMR'''

Notes on electrolysis
[[Media:electrolysis.pdf|Click here]] for the notes on electrolysis'''

June 2000 Question 1
Titration of FA1 with FA2

Summary iodine liberated by 25.0 cm3 of FA 1 required 25.25 cm3 of FA2 (a) Mr of Na2S2O3.5H2O = 248 Concentration of FA2 = 37.23 / 248                               = 0.150 moldm-3(b) 1000 cm3 of FA2 contains = 0.150 mol S2O32- 25.25 cm3 of FA2 will contain = 0.150 / 1000 x 25.25 moles                                              =   3.79 x 10-3 moles S2O32- (c) According to equation

2 S2O32- + I2 --&gt; S4O62- + 2I-

2 moles S2O32-react with 1 mole I2 3.79 x 10-3 moles S2O32- --&gt; 1.895 x 10-3 moles I2

(d) 1000 cm3 FA1 contains 0.05 moles CrO42- 25 cm3 of FA1 0.05 / 1000 x 25 moles CrO42-                   1.25 x 10-3 moles CrO42-

(e) 1.25 x 10-3 moles CrO42- react with 1.895 x 10-3 moles I2 1 mole CrO42- react with 1.895 x 10-3 / 1.25 x 10-3 moles I2 = 1.52 moles I2

Since 2I- --&gt; I2 + 2e-

Number of moles of I- = 2 x 1.52                               = 3.04 moles (f) Cr3+ ions

(g) CrO42- + 8H+ + 3I- --&gt; Cr3+ + 3/2  I2 + 4H2O