2022 NECO: HOW TO GET NECO QUESTION AND ANSWER BEFORE EXAM START

WAEC: 2022 NECO TIMETABLE

EXPO: NECO ANSWER DAILY SUBSCRIPTION PRICE LIST

NECO: 2022 NECO OFFICIAL TIMETABLE

WAEC Chemistry Practical Answer – 2022 Expo

2022 WAEC Chemistry practical question and answer

=========================

(1a)
Volume of pipette used, VA = 25.0cm³

[TABULATE]

Burette Reading | Rough titre | 1st titre | 2nd titre |

Final Burette reading (cm³) | 25.60 | 32.80 | 26.40

Initial Burette reading (cm³) | 1.20 | 8.70 | 2.30

Volume of Na₂S₂O₃ used | 24.40 | 24.10 | 24.10

Average burette reading = (24.10 + 24.10)/2
Average volume of Na₂S₂O₃ used = 24.10cm³
VB = 24.10cm³

(1bi)
Given: CB = 0.1mol/dm³
VB = 24.10cm³
VA = 25.0cm³
CA =?
From equation nA/nB = 1/2
.: Using (CABA)/CBVB = (nA)/nB

(CA x 25)/(0.1×24.10) = 1/2
CA = (0.1×24.10)/(25×2)
CA = 0.0482mol/dm³
.: Concentration of iodine in A = 0.0482mol/dm³

(1bii)
Mass in gramms of iodine in 1dm³ of A = Molarity × Molar mass of iodine
= 0.0482×127(2)
= 12.2428g/dm³
=============================

(2a)
[TABULATE]

=TEST=
C + Distilled water

=OBSERVATION=
It dissolves completely to give a light green solution.

=INFERENCE=
Soluble salt.

(2ai)
=TEST=
Solution C + NaOH in drops and in excess + Heat gently

=OBSERVATION=
A dirty green precipitate is formed which remains insoluble in excess.
Effervescence occurs in which a colourless gas with a pungent smell which turns red litmus blue is given off.

=INFERENCE=
Fe²⁺ is present.
NH₃ gas form.
NH₄⁺ is present.

(2aii)
=TEST=
Solution + BaCl₂ + dilute HCL in excess

=OBSERVATION=
A white precipitate is formed.
The white precipitate remains insoluble and gives a white dense forms

=INFERENCE=
SO₄²⁻, CO₃²⁻, SO₃²⁻, is present.
SO₄²⁻ confirmed.

(2b)
Cations → Fe²⁺ and NH₄⁺
Anions → SO₄²⁻
=============================

(3a)
Carbon (iv) oxide turns like water milky white while sulphur (iv) oxide does not

(3b)
(I) H₂: Downward displacement of air
(II) NH₃: Downward displacement of air
(III) HCL: Upward displacement of air

(3bii)
I – It is less dense than air
II – It is less dense than air
III – It is denser than air

(3c)
(i) Distillation
(ii) Filtration followed by evaporation to dryness

(3d)
This is because KCl react with NaHCO₃ to form two salts
=============================

Completed ✅✅✅

The West African Examinations Council, 2022 WAEC Chemistry practical question and answer for this year (2022) is live here on Expospy.com.ng, the best exam portal of all time.

Are you one of the candidates sitting for the West African Senior School Certificate Examination (WASSCE) and looking for where to get the 2022 WAEC Chemistry practical question and answer? Find nowhere again as you are in the right place to get it.

As extracted from the 2022 timetable, WAEC Chemistry practical will be held Tuesday, 14/06/2022.

Here is the schedule of all exams scheduled for the day.

Tuesday, 14th June, 2022

Chemistry 3 (Practical) (Alternative A) 9:30am – 11:30am (1st Set)
Chemistry 3 (Practical) (Alternative A) 12:00noon – 2:00pm (2nd Set)

===============================================

How to get 2022 WAEC Chemistry practical question and answer

To get legit Chemistry practical answers, both obj and essay/theory delivered to you, kindly follow this instruction.

So you are still asking yourself, How do I get WAEC CHEMISTRY PRACTICAL Answer 2022? Here are the details.

1. Whatsapp Answer

Send MTN Recharge Card worth N500 to get the whole 2022 WAEC Chemistry practical question and answer on your WhatsApp inbox.

 

2. Online Pin/Password Answer

Send MTN Recharge Card worth N500 to get the whole WAEC Chemistry practical question/answer online via our password-protected page here.

 

How to Subscribe:

1. For WhatsApp Answer

Send the Recharge card pin, Subject name (WAEC CHEMISTRY PRACTICAL 2022) as a WhatsApp message to 09050785267 on WhatsApp.

Warning: Please don’t call the number and don’t message the number on WhatsApp if you didn’t agree to anything posted here. If you know you do not have a specific amount, don’t bother to text the number.

2. For the Password link answer

Send The card pin, Subject name (WAEC CHEMISTRY PRACTICAL Answer), and your phone number as SMS to 09050785267.

Warning: Please don’t call the number and don’t message the number on WhatsApp if you don’t agree to anything posted here. If you know you do not have a specific amount, don’t bother to text the number.

  • Please carefully follow the instructions so that we can better assist you.
  • Please do not call us because the number is inactive for the call; instead, send us an SMS or Whatsapp message, and we will respond to your text as fast as possible.
  • Please don’t come to WhatsApp and start asking irrelevant questions so that we will not ignore your message; kindly go straight to the point.
  • If you have a trust issue or think we can scam you ordinary N500 or N800, please leave this and go and face the exam with your brain and do it if it is easy.
  • Kindly make sure you subscribe a day before an exam to make your subscription faster and receive answers earlier.

CLICK HERE TO ENTER THE PASSWORD AND VIEW THE ANSWER

Difference between Whatsapp and online answers.

  1. Whatsapp Candidate Gets Answers on the Whatsapp platform.
  2. On this subscription package, We will send both OBJ and Essay to you on Whatsapp via our broadcast list.
  3. Online Password link Candidates Gets Answers on pin protected page.
  4. On this subscription package, We will send a Password/Pin directly to your phone number, which you will use to access the Answers Online on our ANSWER PORTAL.

 

NOTE: All Message Sent To The Above Number Are Attended To. The Phone Number Might Not Be Available To Avoid Distraction.

Again, please do not call us because the number is inactive for the call; instead, send us an SMS or WhatsApp message, and we will respond to your text as fast as possible.

Expospy has never failed or scammed a student, and we pledge to continue providing the best to our candidates and subscribers, including the WAEC Chemistry practical expo runs.

N500 can save you from writing the 2022 WASSCE Chemistry practical question next year if you subscribe now. Heaven helps those who help themselves.

Please Don’t Come Here For Free Answers So That You Won’t Be Disappointed.

WAEC Chemistry Practical Specimen 2022

NO.(1)
INSTRUCTIONS

NO.(2)
In addition to the fittings and reagents normally found in a chemistry laboratory, the following apparatus and materials will be required by each candidate.

(a) One Burette of 50cm3 of capacity
(b) One pipette, either 20cm3 or 25cm3 (All candidates at one center must use pipettes of the same volume, these should be clean and free from grease).
(c) The usual apparatus for titration
(d) The usual apparatus and reagents for qualitative work including the following with all reagents appropriately labeled:
(i) 10% dilute sodium hydroxide solution
(ii) dilute hydrochloric acid
(iii) dilute trioxonitrate
(v) acid
(iv) silver trioxonitrate
(v) acid
(v) acidified potassium dichromate solution
(vi) aqueous ammonia
(vii) lime water
(viii) red and blue litmus paper
(ix) dilute
(vi) tetraoxosulphate
(x) aqueous barium chloride

(e) Spatula
(f) Filtration apparatus,
(g) One beaker
(h) One boiling tube
(i) Four test tubes
(j) Starch solution indicator
(k) Glass rod
(l) Wash bottle containing distilled/deionized water,
(m) Burning splint,
(n) Watch glass
(o) Bunsen Burner/source of heat
(p) Droppers

NO.(3)👇🏾
(a) 150cm3 of iodine solution in a corked flask or bottle labeled ‘An’. These should all be the same containing 25.4g of I2 in 6.0g kl per dm3 of solution.
(b) 150cm3 of sodium thiosulphate pentahydrate solution in a corked flask or bottle labeled ‘Bn’. These should all be the same containing 24.82g of Na2S2O3 per dm3 of solution.
(c) One spatulaful of ammonium ferrous sulphate, (NH4)2Fe(SO4)2.6H2O in a specimen bottle labeled ‘Cn’.

NOTE:
This must be the same for all candidates.

=========================

Expospy.com.ng posts all exam expo answer earlier than others
============================

GOODLUCK!!!

Add a Comment

Your email address will not be published.