WAEC GCE Chemistry Practical 2021. Many WAEC GCE candidates find it difficult to answer the WAEC GCE Alternative to Practical Chemistry correctly due to not understanding the questions. I will show you the best way to answer the 2021 WAEC GCE Chemistry Practical questions and make a good grade in your Chemistry examination.
It is pertinent you understand the WAEC GCE Chemistry Practical making scheme before attempting any questions so as to present your answers in such a way that it will look attractive to the examiner to earn you big marks.
Bear in mind that every single procedure is awarded marks. So, ensure you do not skip any step while reporting and presenting your practical results.
The Chemistry Practical question paper will consist of two sections and general Chemistry questions namely:
- Quantitative Analysis
- Qualitative Analysis
These involve titration and test of ions. You will be expected to carry out an experiment and report your inference and observation. What you will see will not be far from the WAEC Chemistry Specimen given to your school.
Note: Your titration endpoint will be given to you by your Chemistry teacher. It is not the same for every school but within a range.
Do not use the endpoint here. It may vary from your center endpoint but you can follow the calculation procedures.
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WAEC GCE Alternative to Practical Chemistry Questions and Answers (Expo)
Note: The 2021 WAEC GCE Alternative to Chemistry Practical answers will be posted here during the WAEC GCE Practical Chemistry exam. Keep checking and reloading this page to know when the answers are posted. Do not forget to reload this page in order to see the answers.
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Today’s WAEC GCE Chemistry Practical Answers:
Note: The answers below are the 2020 Nov/Dec answers. The 2021 January/February answers will soon be posted.
The questions below are strictly for practice, not the 2021 Chemistry expo.
All your burette readings (initials and final), as well as the size of your pipette, must be recorded but no account of experimented procedure is required. All calculations must be done in your booklet.
1. A is O.200 moldm3 of HCI. C is a solution containing 14/3g of Na2CO3. x H2O in 500 cm3 of solution. (a) Put A into the burette and titrate it against 20.0 cm3 or 25.0 cm3 portions of C using methyl orange as indicator. Repeat the titration to obtain Consistent titre values. Tabulate your results and calculate the average volume of A used. The equation for the reaction is: Na2CO3 x H2O + 2HCL(aq) → 2NaCI(aq) + CO2(g) + (x+1) H2O(I).
(b) From your results and the information provided. Calculate the: (i) concentration of C in moldm-3; (ii) concentration of C in gdm-3; (iii) molar mass of Na2CO3, xH2O; (iv) the value of x in Na2CO3 xH2O. [H = 1.0; C=12.0; O = 16.0; Na =23.0]
Credit will be given for strict adherence to the instruction, for observations precisely recorded and for accurate inferences. All tests, observations and influences must be clearly entered in the booklet in ink at the same time they are made.
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