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WAEC Chemistry Practical Questions And Answers 2021: Get The Complete List Of WAEC Chemistry Practical Answers Here

WAEC Chemistry Practical Questions And Answers 2021 - Students who have applied for the Chemistry Practical exam have been searching for WAEC Chemistry Practical Questions And Answers 2021. The article below has the completeWAEC Chemistry Practical Questions And Answers 2021 along with the WAEC Chemistry Practical Specimen List

by Maria Thomas | Updated Sep 15, 2021 09:59 AM

WAEC Chemistry Practical Questions And Answers 2021: Get The Complete List Of WAEC Chemistry Practical Answers Here
Source: NDTV

WAEC Chemistry Practical Questions And Answers 2021

The ongoing WAEC exams have created an undue interest amongst the students especially to know the questions and answers asked in a particular exam. The same can be seen in the case of  the WAEC chemistry practical 2021 Exam whose WAEC chemistry practical questions and answers 2021 has been highly sought after. The WAEC chemistry practical questions and answers 2021 are usually based on WAEC Chemistry Practical Specimen 2021. The students will be required to observe the WAEC Chemistry Practical Specimen 2021 and answer the Chemistry practical questions 2021 accordingly. The WAEC chemistry practical 2021 Exam is expected to have been conducted on 14th September 2021 and as such getting our hands on the WAEC Chemistry Practical Specimen 2021and WAEC chemistry practical questions and answers 2021is difficult. Thus, the WAEC chemistry practical questions and answers 2021 that we have assembled here are not accurate. We have assimilated the list of WAEC Chemistry Practical Questions And Answers 2021 here in the section below for students who are interested in the same

List Of WAEC Chemistry Practical Specimen 2021

Before we look at the WAEC Chemistry Practical Questions And Answers 2021 we must know what the WAEC Chemistry Practical Specimen 2021 are, based on which the WAEC Chemistry Practical Questions 2021 are framed. There have been discrepancies regarding the WAEC Chemistry Practical Specimen 2021, thus the specimen list that we have collected in the section below might not be the most accurate ones

a) One burette of 50cm³ capacity.

(b) One pipette, either 20cm³ or 25cm³.

(c) The usual apparatus for titration;

(d) The apparatus and reagents for qualitative work including the following with all reagents appropriately labelled.

(i) Dilute sodium hydroxide solution.

(ii) Dilute hydrochloric acid.

(iii) Dilute trioxonitrate acid.

(iv) Silver trioxonitrate solution.

(v) Acidified potassium dichromate solution.

(vi) Aqueous ammonia.

(vii) Lime water.

(viii) Red and blue litmus paper.

(ix) Dilute tetraoxosulphate acid. 

(e) Spatula.

NOTE - The List Of WAEC Chemistry Practical Specimen 2021 that we have given here are not accurate thus, students will need to approach them caution

WAEC Chemistry Practical Questions 2021

The  WAEC Chemistry Practical Questions 2021 are generally based on practical skills that are displayed at the time of exam. Considering the fact that WAEC Chemistry Practical Questions And Answers PDF 2021 are for a practical exam it is only expected that the students will be expected to display practical skill sets which will be the base for WAEC Chemistry Practical Questions. But we have not managed to get our hands on the WAEC Chemistry practical questions though we have managed to get the WAEC Chemistry practical answers which we have given in the following sections

WAEC Chemistry Practical Questions And Answers PDF 2021

We have assimilated the WAEC Chemistry practical questions and answers 2021 in the format of a WAEC Chemistry practical questions and answers PDF 2021. Though we have only the answers which will be based on the list of WAEC Chemistry Practical Specimen 2021

(1a)

Volume of burrete = 50.00cm³

Volume of pipette = 25.00cm³

Indicator = Methyl orange

Final burette readings (cm³); 37.50 | 22.50 | 37.50 | 44.50

Initial burette readings(cm³); 0.00 | 0.00 | 0.00 | 0.00

Volume f Acid used (cm³); 37.50 | 22.50 | 22.50 | 22.50

Volume of A used = 1st + 2nd + 3rd/3

= 22.50+22.50+22.50/3

Average volume of A used = 22.50cm³

(1bi)

Concentration of A ( CA )

2.03g in 500cm³ of solution

Volume = 500cm³/1000 = 0.500dm³

In g/dm³ = 2.03/0.5 = 4.06g/dm³

To find concentration in mol/dm³

Conc. of A in mol/dm³ = Conc. of A in g/dm³/Molar mass

Conc. of A in mol/dm³ = 4.06/36.5

= 0.1112mol/dm³

Molar mass of A (HCL) = 1+35.5 = 36.5g/mol

(1bii)

Number of mole of the Acid in average titre

Na = CaVa

= 0.1112 × 22.50

= 2.52moles

(1biii)

Nb= ? Na= 3, Ca= 0.1112mol/dm³, Cb = 0.12mol/dm³ , Va = 22.50cm³, Vb = 50.00cm³

CaVa/CbVb= nA/nB

0.1112×22.50/0.12×50 = 3/nB

nB × 2.502 = 18

nB = 18/2.502 =

:. nB = 7.194moles

= 7moles(approx.)

(1biv)

Mole ratio of Acid to base

nA:nB = 7:3

(2a)

Test; C + 10cm³ of distilled water + filter

Observation; C dissolves partially to give a light green solution. Blue filtrate and green residue

Inference; C is a mixture of soluble and insoluble salt

(2bi)

Test; 2cm³ of filtrate + NaOH in drops in excess

Observation; Blue precipitate remains

Inference; CU²+ is present

(2bii)

Test; 2bi + warm

Observation; a colourless gas with a chocking smell which turns moist red litmus blue and forms dense white fumes with hydrogen chloride gas

Inference; NH³ from NH⁴+

(2biii)

Test; 2cm³ of filtrate + BaCl² + excess HCl

Observation; white precipitate, precipitate Remains

Inference; SO²- CO3²- or SO4²- is present, SO4²- confirmed

(2ci)

Test; Residue + HNOg

Observations; effervescence of a colourless and odourless gas which turns like water milky and turns moist blue to litmus red

Inference; CO2 from CO3²-

(2cii)

Test; 2ci + NH3 in drops in excess

Observations; blue precipitate. Precipitate dissolved to give a deep blue solution

Inference; CU2+ present

CU2+ confirmed

(3ai)

The value will increase

(3aii)

The occur as a result of the decrease in the concentration of base due to the added volume of water

(3bi)

There will be no visible reaction because copper is less than Zinc in the electrochemical series

(3bii)

It absorb water and become sticky because it is hygroscopic

(3biii)

The solution turns pink

(3c)

When NaOH is added to the solution of zn³+, a white precipitate is formed which later dissolve in excess NaOH due to the formation of zinc hydroxide

NOTE - The WAEC Chemistry Practical Answers that we have given here are not accurate answers nor are they the complete list of answers. Thus students should take these answers with caution and cross refer. Keep updated to get the complete WAEC Chemistry Practical Questions And Answers 2021

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WAEC Chemistry Practical Questions And Answers 2021 - FAQs

1. What is WAEC ?

WAEC is the acronym for West African Examination council which is an examination and education board in West Africa established by the law to conduct exams for West African Students.

2. When did WAEC 2021 Start?

It is expected that the WAEC 2021 will have started from 16th August 2021

3. Where can I get WAEC Chemistry Practical Questions and answers 2021?

You can get WAEC Chemistry Practical questions and answers 2021 here

4. What are the two exam conducted by WAEC ?

SSCE and GCE are the two exam conducted by WAEC

5. What is SSCE?

WASSCE - conducted in May - June is called the SSCE

6. What is GCE?

WASSCE - conducted in November - December is called the WAEC or GCE

7. What is the name of the conducted by WAEC?

WASSCE - West African Senior School Certificate Examination is the name of the exam conducted by WAEC