Sharp WAEC GCE Chemistry Practicals Questions and Answers

Sharp WAEC GCE Chemistry Practicals Questions and Answers | This page is solely for candidates about to sit for GCE chemistry practicals specimen and also the objective and essay part of the exam.

In this post candidate will learn about WAEC GCE Chemistry Practical Specimen 2018 – Before we commence candidate should first Check Here

Confirm 2018 WAEC GCE Chemistry Practical Specimen

The Waec Gce chemistry specimen for 2018 practical exam have been released. The General Certificate Examination (GCE) for August / September Waec Chemistry alternative to practical paper will be written on Friday, 14th September, 2018 from 9:30am to 11:00am.

As a matter of fact our able team made this post just to stress more on samples of the Specimens, alternative to practical graphs and calculations that was used in the Chem Practical Examination past questions and syllabus. Please we urge candidate to take this seriously as it has been proven over time that practical questions are basically repeated.

Sharp WAEC GCE Chemistry Practicals Questions and Answers

Sharp WAEC GCE Chemistry Practicals Questions and Answers

Paper 3 (Alternative To Practical)
Answer Three questions.
Write your answers in the spaces provided.

1. A student adds a known mass of magnesium ribbon to 100 cm3 of dilute hydrochloric acid (an excess) in the apparatus shown below. Hydrogen gas is evolved. The time taken to collect 48 cm3 of gas at room temperature and pressure is measured.

Sharp WAEC GCE Chemistry Practicals Questions and Answers

(a) (i) Name apparatus A.
(ii) Name apparatus B.
(b) (i) Calculate the number of moles of hydrogen in the 48 cm3 of gas.
[1 mole of any gas occupies 24 000 cm3 at room temperature and pressure.]

(ii) Use the equation below to deduce the mass of magnesium used in the experiment to produce 48 cm3 of hydrogen at room temperature and pressure. [Ar : Mg, 24]
Mg + 2HCl MgCl2 + H2
(c) Give a test for hydrogen gas.

Sharp WAEC GCE Chemistry Practicals Questions and Answers

(d) What is the effect on the time taken to collect the same volume of gas if,
(i) large lumps of the same mass of magnesium are used instead of magnesium ribbon,
(ii) the reaction is carried out at a higher temperature?

2. (a) A student investigates the electrolysis of aqueous copper(II) sulfate using graphite electrodes and the apparatus shown below.

Sharp WAEC GCE Chemistry Practicals Questions and Answers

(i) What is observed at electrode R?
(ii) Construct the equation for the reaction taking place at electrode R.
(iii) When graphite electrodes are used a colour change is seen in the solution. What is this colour change? Explain why it happens.
(iv) When graphite electrodes are used, a gas is evolved at one of the electrodes. Name the gas and give a test for the gas.
(v) If the graphite electrodes are replaced with copper electrodes, no colour change is seen on electrolysis of the solution. Explain why.

(b) The student does more experiments using the apparatus in (a) with graphite electrodes
but, in each case, using a different electrolyte.
Complete the table below.

Sharp WAEC GCE Chemistry Practicals Questions and Answers

waec chem practical | Sharp WAEC GCE Chemistry Practicals Questions and Answers

Sharp WAEC GCE Chemistry Practicals Questions and Answers

  1. waec gce chemistry alternative to practical past questions,
  2.  gce chemistry practical 2017,
  3. waec chemistry practical 2018,
  4. 2018 waec specimen,
  5. gce chemistry practical answers 2017,
  6. specimen for chemistry waec,
  7. gce 2017 economics question,
  8. waec 2017 economics answers,
  9. 2017 waec economics questions,
  10. waec 2017 chemistry practical question and answer,
  11. waec chemistry practical 2017,
  12. 2017 waec economics theory questions,
  13. waec 2017 economics question and answer,
  14. waec 2018 economics question and answer,
  15. latest waec question and answer on economics,
  16. waec past questions and answers on economics pdf,
  17. economics waec expo 2018,
  18. expo economics 2018,
  19. economics answer waec 2018,
  20. waec economics objective answers,
  21. wakagist waec,
  22. www wakagist com gce 2018,
  23. wakagist waec 2018,
  24. waec 2018 economic objective answer,
  25. 2019 waec gce expo,
  26. 2018 waec gce answers,
  27. waec expo free,
  28. free exam expo sites,
  29. 2018 gce runz,
  30. websites for gce answers,
  31. best exam expo site,
  32. gce 2018 expo site,
  33. naija exam expo site,
  34. best exam expo site,
  35. free waec gce expo site,
  36. guru exam expo,
  37. exam expo portal,
  38. neco exam expo site,
  39. expo loaded,
  40. free waec expo 2018.

For more details on this post candidates are open to comment below as we are ready to assist you in the best way we can.

Please follow and like us:

Related Post

Best GCE Economics Questions and Answers in 2018 Best GCE Economics Questions and Answers in 2018 in this post candidate writing the GCE WAEC examinations will get the best from the rest of all e...
READ  Latest Tech Update See Apple iPhone 8 event, start time, live stream Finally live blog

Leave a Comment

Your email address will not be published.