Chemistry Unit 3B things you should know

[Jinnah]

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^

 

[Jinnah]

Chemistry Unit 3B exam revision - http://www.thestudentroom.co.uk/wik...it_3B_-_Laboratory_Techniques_-_Test_for_Ions

 

[rand bawab]

hey when are ur exams ? are all the eternals at the same time ??

 

[Jinnah]

hey when are ur exams ? are all the eternals at the same time ??

Chemistry Unit 3B will be held on Wednesday, but timings will be depend on the location.

Note - Chemistry Unit 3B exam in Riyadh the time has been changed to 3:00 pm -4:15 pm. If you have anymore questions contact British Council in Riyadh.

Telephone

+966 1483 1818

 

[DANGERBP]

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^

nd all that r some ??
lol how much more we need to no man ??