Home | WAEC | NECO | NABTEB | UTME JAMB | WAEC GCE | NECO GCE| NABTEB GCE | JUPEB | JOINT EXAM | SCHOOL NEWS

WAEC: OFFICIAL WASSCE 2021 TIMETABLE


WAEC: How TO GET 2021 WAEC Question & Anwer Before Exam Start

WAEC 2021 Chemistry (Practical) Question and Answer

WAEC 2021 Chemistry Expo Answer

WAEC CHEMISTRY PRACTICAL ANSWER 2021

(1a)
Volume of burrete = 50.00cm³
Volume of pipette = 25.00cm³
Indicator = Methyl orange

TABULATE

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 = 25.00cm³

CaVa/CbVb= nA/nB

0.1112×22.50/0.12×25 = 3/nB

nB × 2.502 = 9
nB = 9/2.502 =
nB = 3.597moles

(1biv)
Mole ratio of Acid to base
nA:nB
= 3:3
= 1:1

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

(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

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

The 2021 WAEC Chemistry Practical Solution Expo Questions and Answers have indeed been long expected and much anticipated. While the official body to conduct the 2021 Senior School Certificate Examination which is the West African Examination Council was originally slated for May/June, but due to some reasons best known to the body, it is now scheduled for August/September.

The following is the examination schedule.

Tuesday, 14th September

WAEC Agric Practical) Answer


Chemistry 3 (Practical) (Alternative A) 9:30 am. – 11:30 am. (1stSet)
Chemistry 3 (Practical) (Alternative A) 12:00noon. –2:00pm.(2ndSet)


Chemistry 3 (Alternative D)(Alternative to Practical Work) 9:30am. –11:00am.

 

You are welcome to the May/June 2021 Expo Runz Real and Verified WAEC ChemistryPractical Questions and Answers.

Verified WEST AFRICA EXAMINATION COUNCIL 2021 Chemistry Solved Answer Page via Expospy

The 100% Verified 2021 WAEC Chemistry Questions and Answers Are Now At Hand.
Subscribe Now to Receive Complete Answer.
WAEC Questions and Answers for All Subjects Are Delivered Hours Before the Exam Begins.

How to Get WAEC Chemistry Answer 2021 ?

1.Whatsapp Answer

Simply Send MTN Recharge Card worth N500 to get the whole WAEC 2021 Chemistry answer online via our password protected page.

2. Online Pin/Password Answer

Simply Send MTN Recharge Card worth N500 to get the whole WAEC 2021 Chemistry answer online via our password protected page.


How to Subscribe:
1. For Whatsapp Answer
Send The card pin, Subject name(WAEC Chemistry Answer) as whatsapp message to 09050785267 on Whatsapp.(Please don’t call the number and don’t message the number on Whatsapp if you didn’t agree to anything posted here)

2. For Password link answer
Send The card pin, Subject name( WAEC Chemistry Answer ) and your phone number as SMS to 09050785267 (Please don’t call the number, just send your card)

Please carefully follow the instructions so that we can better assist you.

Please do not call us because the number is inactive for call; rather, 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 your message will not be ignored, kindly go straight to the point.

WAEC 2021 CHEMISTRY PRACTICAL SPECIMEN

APPARATUS AND MATERIALS REQUIRED:

(1) One burrette of 50cm³ capacity

(2) One pipette, either 20cm³ or 25cm³
*All candidates at one centre must use pipettes of the same volume.

(3) The usual apparatus for titration

(4) The usual apparatus and reagents for qualitative work including the following with all reagents appropriately labelled
(i) dilute sodium hydroxide solution
(ii) dilute hydrochloride acid
(iii) dilute trioxonitrate(v) acid
(iv) barium chloride solution
(v) acidified potassium dichromate solution
(vi) aqueous ammonia
(vii) lime water
(viii) red and blue litmus papers
(ix) dilute tetraoxosulphate(vi) acid.

(5) Spatula

(6) Fitration apparatus

(7) One beaker

(8) One boiling tube

(9) Four test tubes

(10) Methyl orange as indicator

(11) Glass rod

(12) Wash bottle containing distilled/deionized water

(13) Burning splint

(14) Watch glass

(15) Bunsen burner/source of heat

(16) Droppers

(17) Mathematical table/calculator.

* Each candidate should be supplied with the following, where n is the candidates serial number.

(a) 150cm³ of a solution of Hcl, in a corked flask or bottle labelled ‘An‘. These should be the same containing 9.0cm³ of concentrated Hcl (about 36%) per day of solution.

(b) 150cm³ of NaOH solution in a corked flask or bottle labelled ‘Bn‘. These changes should all be the same containing 4.8g of NaOH per dm³ of solution.

KINDLY MAKE SURE YOU SUBSCRIBE A DAY BEFORE EXAM IN ORDER TO MAKE YOUR SUBSCRIPTION FASTER AND RECEIVE ANSWER/ FASTER.

CLICK HERE TO ENTER THE PASSWORD AND VIEW THE ANSWER

NOTE

  • Direct Mobile Candidates Gets Answers on their Phones as SMS.
  • Whatsapp Candidate Gets Answers on the Whatsapp platform
  • Online Password link Candidates Gets Answers on pin protected page

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

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

Expospy has never failed or scam a student, and we pledge to continue providing the finest to our candidates and subscribers, including WAEC 2021 Chemistry.

WE DON’T TALK MUCH
PLEASE Note

-Chemistry cost N800 for direct mobile
-Chemistry cost N500 for subject for Online Password/Pin Link answer

-Chemistry cost N500 for Whatsapp Answer
-Do not call us just Whatsapp message, we will reply to your message immediately
-Know the difference between password link/online answer and direct mobile
-Always subscribe to Expospy.com to get your answer before exam start.

N500 CAN SAVE YOU FROM WRITING WAEC Chemistry 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

 

Where to get WAEC Chemistry Questions and Answers

The only guarantee best exam portal you can get 2021 WAEC Chemistry answer is Expospy.com.ng
Over the years we’ve been into the system and our record speaks for us.
Expospy will never and ever provide you fake exam question and answer. We only dispatch after verification.

Beware of those fake website that will promise you that answer will be sent to you 2 days before the exam start. They are all fake and will only collect your money and send you answer while the examination is going-on.
=========================

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

GOODLUCK!!!

How to Get 2021 WAEC Question and Answer Before Exam Start

Search Terms: Legit and Accurate WAEC 2021 Chemistry answer, WAEC ssce 2021 Chemistry Theory expo answers, Ssce 2021 Chemistry Expo answers now available, June/July Chemistry Answers for 2021, Chemistry Questions WAEC Ssce Expo Answers Here, Free wassce Chemistry Theory objective, essay & theory correct Expo 2021 answers Runz WAEC Chemistry Theory, WAEC Ssce 2021 Free Chemistry Theory essay, Theory Questions and Answers Expo for WAEC Chemistry Theory Paper 1 and Paper 2 Theory Questions and Answers Expo Now Posted, Free Chemistry Theory objective ans for internal ssce, see WAEC ssce expo Chemistry , essay questions for free, expotab correct wassce Chemistry ans, sure WAEC ssce Chemistry Theory objective answers runz runs expo free real and correct WAEC ssce 2021 June/July Chemistry Theory free expo runz runs ans answers online for free see free answers online, Chemistry WAEC question and answer, 2021/2021 Chemistry expo, where can i get free WAEC agric answer or question, show me free expo website for WAEC agric answer 2021 runz, 2021 Verified WAEC Free Ssce Chemistry Answers have been posted REAL WAEC SSCE Chemistry Theory QUESTIONS & ANSWERS Direct To Phone Number AS Text message, bekeking 2021 WASSCE Chemistry Theory (Expo) WAEC 2021 examsub runs Chemistry Theory questions and answers WAEC SSCE June/July 2021 Chemistry / ESSAY / OBJ QUESTION AND EXPO I need WAEC ssce free expo site, how can I get WAEC Chemistry Theory answer for free, WAEC 2021 Chemistry Theory essay, Objective And Theory Question and Answer Now Posted, Real 2021/2021 June/July wassce WAEC Chemistry Theory objective, essay and theory 100% correct expo questions and answers runz chokes runs, verified 2021 WAEC Chemistry , essay and obj eduwapaz WAEC Chemistry Theory expo website, WAEC ssce Chemistry Theory live cheats, legitsource sure WAEC Chemistry ANSWER 2021 JUNE/JULY 2021 Chemistry Theory original objective, theory and essay questions and answer now available here, 100% examkey WAEC ssce Chemistry Theory expo, 2021 wassce Chemistry Theory obj, essay and theory runz now posted, correct WAEC ssce Chemistry Theory objective, essay (theory) answer now ready, free 2021 wassce Chemistry Theory obj, theory and essay best expo site WAEC ssce Chemistry Theory questions and answers, password for certified WAEC ssce Chemistry Theory essay theory obj expo, how to get/ where to get wassce Chemistry, Expospy WAEC Chemistry Theory, 042tvseries WAEC 2021 Chemistry theory, expolegit WAEC Chemistry theory answer, WAEC2021 legitexpo WAEC Chemistry theory answer, wakagist WAEC Chemistry theory answer 2021, wakagist WAEC 2021 Chemistry theory answer, earboard Chemistry theory answer, naijaexam WAEC Chemistry theory answer, essay and objective expo answer direct to my phone as text message, trusted WAEC ssce Chemistry Theory questions and answer, i need WAEC Ssce June/July Chemistry Theory essay theory objective obj Expo 2021 answers on whatsapp, gidifans Chemistry Theory answer, expocoded Chemistry Theory answer, wakagist Chemistry Theory answer, codedexam WAEC Chemistry Theory answer, expobomb Chemistry Theory answer, legitexpo Chemistry Theory expo, Expospy Chemistry Theory expo, examgists WAEC Chemistry Theory expo, WAEC Chemistry Theory objectives answer, examclass WAEC Chemistry Theory expo free answer. Undiluted Chemistry WAEC expo runz from best expo site 2021.

With Mr Spy, your success is guaranteed in 2021 WAEC Chemistry Answer.
Best Regards.

Add a Comment

Your email address will not be published. Required fields are marked *