Answer of Edexcel AS Chemistry Student’s Book

Direct Download Answer of Edexcel AS Chemistry Student’s Book

Edexcel International AS Chemistry

Direct download link for Edexcel AS Chemistry Unit-1 , Edexcel AS Chemistry unit 1, Collection of Formulae, Equation & Amount of substance (Jan 2013-June-2014) Related past question. You will get an idea about the type of question.
1.3 Formulae, Equation & Amount of substance (Jan 2013-June-2014)

Edexcel International AS Chemistry- Unit-3B

Here are some topics you should know for Chemistry Unit 3B exam.

• Test for Halides
• Flame tests
• Preparation of aldehydes using simple distillation and carboxylic acids by heating under reflux
• Preparation of halogenoalkanes
• Test for alkenes using bromine water and acidified potassium per manganate
• Test for halide present in a halogenoalkane by warming with sodium hydoroxide dissolved in ethanol followed by dilute nitric acid (to neutralize OH) and silver nitrate followed by ammonia solution
• Distinguish between aldehydes and ketones using Benedicts or Fehlings solution. Formation of red precipitate confirms aldehyde
• Drawing apparatus for simple distillation, heating under reflux and seperation of two immiscible liquids (dropping funnel)
• Test for sulfates, sulfites and carbonates using barium chloride solution
• Energetics: Enthalpy of neutralisation, combustion and displacement
• Rates of reaction
• Chemical equilibria
• Reactions of group 2 and group 7 elements
• Volumetric analysis: esp thiosulfate
• Test for SO2, CO2, H2 and O2. (by sankait36): SO2 - turns acidified potassium dichromate(VI) from orange(Cr6+) to green(Cr3+), CO2 - turns lime water milky (due to insoluble calcium carbonate), H2 - test with burning splint, ignites with a pop sound, O2 - relights a glowing splint
• Uncertainties (by sankait36): uncertainty = (maximum reading) - (minimum reading) / 2 , %uncertainty = (uncertainty / actual reading) * 100
• In titration, discard the titre that is not concordant to 0.2 cm^