It is now possible to purchase the WAEC GCE Chemistry to Practical Questions and Answers 2022 book.
Alternative to Practical Questions and Answers for WAEC GCE Chemistry 2022 is now available.
The alternative questions and answers for the examination of the Waec Gce chemistry practical 2021 have been made available. On Monday, February 7th, 2022, from 2:00 to 3:30 in the afternoon, students will have the opportunity to take the General Certificate Examination (GCE) for WAEC Chemistry as an alternative to the practical test.
This page was created in order to draw attention to some examples of the Specimens, which are an alternative to the practical graphs and calculations that were included in the Chemistry Practical Exam's previous questions and curriculum.
Alternate practical for the WAEC GCE Chemistry exam, 2022.
Paper 3 (Alternative To Practical)
Give your responses to the following:
Please jot down your responses in the corresponding places given.
1. In the apparatus illustrated below, a student adds a known quantity of magnesium ribbon to an excess of 100 cm3 of dilute hydrochloric acid. This creates an excess. Hydrogen gas is evolved. A time measurement is done to determine how long it takes to collect 48 cm3 of gas at room temperature and pressure.
(a) I Name apparatus A.
(ii) Name apparatus B.
(a) Determine how many moles of hydrogen are contained in the 48 cm3 of gas using the following formula:
At standard conditions (room temperature and pressure), one mole of any gas takes up a volume of 24,000 cm3.
(ii) Using the equation below, determine the amount of magnesium that was used in the experiment to generate 48 cm3 of hydrogen at the same temperature and pressure as the starting point. [Ar : Mg, 24]
Mg + 2HCl yields MgCl2 + H2
(c) Conduct an experiment to determine whether or not hydrogen gas is present.
(d) What kind of an impact does it have on the amount of time it takes to gather the same volume of gas if,
I Instead of magnesium ribbon, big chunks of the same mass as magnesium are employed.
(ii) the process of the reaction takes place at a greater temperature?
2. (a) Using graphite electrodes and the equipment described below, a student conducts research on the electrolysis of aqueous copper(II) sulfate.
Chemistry Alternative to Practical Questions and Answers 2022 is now available.
I What is seen while looking at the electrode R?
(ii) Formulate an equation that describes the reaction that is taking place at the electrode R.
(iii) A noticeable color shift may be seen in the solution whenever graphite electrodes are used. What is causing this shift in color? Please explain why this keeps happening.
(iv) When graphite electrodes are utilized, the production of a gas takes place at one of the electrodes. Identify the gas and provide an appropriate test for it.
(v) The electrolysis of the solution does not result in any noticeable change in color if the graphite electrodes are switched out for copper electrodes. Give your reasoning.
(b) Using the apparatus described in (a), the student conducts additional experiments using graphite electrodes.
but, in each case, using a different electrolyte.
Complete the table below.
waec chemistry practical 2022 gce
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