2023 WAEC Chemistry Practical Answers [ALT. A & B]
Get Free Live 2023 WAEC May/June Chemistry 3 (Practical) (Alternative A & B) (1st & 2nd Set) Specimen Questions and Answers for WASSCE for School Candidates Free of Charge | WAEC May/June Chemistry Practical Free EXPO Room (18th May, 2023).
WAEC May/June 2023 CHEMISTRY PRACTICAL FREE ANSWER ROOM [School Candidates]

Thursday, 18th May, 2023
Chemistry 3 (Practical) (Alternative A) – 09:30am – 11:30am (1st Set)
Chemistry 3 (Practical) (Alternative A) –12:00pm – 2:00pm (2nd Set)
 
Monday, 19th June, 2023
Chemistry 3 (Practical) (Alternative B) – 09:30am – 11:30am (1st Set)
Chemistry 3 (Practical) (Alternative B) – 12:00pm – 2:00pm (2nd Set)

2023 WAEC CHEMISTRY PRACTICAL ALTERNATIVE B ANSWERS | 19TH JUNE, 2023

VITAL INFORMATION

For question 1

Use your school's endpoint and use it wherever you see our endpoint (20.4cm³) ...and calculate with it

Replace our 20.4 in 1bii and do the calculation.

If your school wants to use mine, then the chemistry teacher must submit endpoint similar to ours without much difference...eg 20.40, 20.45, 20.30, etc


ALSO NOTE:
Answer you got while recalculating your 1bii is what you will use in 1biii and 1biv.
If you check our solution, you will see that we got 0.03264, when u use another average titre value (end point), you will not get same, so use what u got and replace our 0.03264 in 1biii and 1biv and re-calculate.

TEACHER'S FORM

(2a)
E contains  7.0 cm³ of concentrated HNO3 per dm³

(2b)
F contains 3.2 g of NaOH per dm³ of solution.

(3)
(i) 20.50 cm³
(ii) 20.40 cm³
(iii) 20.30 cm³
Average: 20.40cm³
 
NOTE THAT: The no 3 is our titre values. This is what determines the marking of ur school's number 1 answers

 

2023 WAEC CHEMISTRY PRACTICAL ALTERNATIVE A ANSWERS | 18TH MAY, 2023

(2a)
8.5

(2b)
5.0


(3)
NOTE: Use your school titre value here. Below value is our school's titre value:
(i) 16.50
(ii) 15.20
(iii) 15.10
Average: 15.15

THIS TEACHER'S FORM DETERMINES HOW WAEC WILL MARK YOR NUMBER 1

TAKE NOTE

For question 1

Use your school's endpoint and use it wherever you see our endpoint (15.15cm³) ...and calculate with it

Replace our 15.15 in 1b and do the calculation.

If your school wants to use mine, then the chemistry teacher must submit endpoint similar to ours without much difference...eg 15.15, 15.20, 15.30, etc


1.

NOTE

In (1ciii) u will multiply 0.1 with ur school's average titre value(endpoint).
You can see that we used 15.15 which is our titre value.

If your school's endpoint is 12.50

Your calculation will be 0.1 x 12.50 / 1000

 

 2.

3ai)
When drops of NaOH is added to 2cm^3 of Pb(NO3)2, a white gelatinous precipitate is formed, which is soluble in excess of it.

(3aii)
When drops of NaOH is added to 2cm^3 of Fe2(SO4)3, a reddish brown precipitate is formed, which is insoluble in excess of it.

(3b)
Put the benzoic acid crystals into a capillary tube fitted to a thermometer with rubber bands in an oil bath. Gently heat and stir until the crystals melt. Note the temperature. This is the melting point.


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TO SUBSCRIBE FOR 2023 WAEC CHEMISTRY PRACTICAL ANSWERS VIA LINK
  1. JUST GO OUT AND BUY MTN CARDS OF N600 (200 + 200 + 200 = 600)
  2. GO TO YOUR MESSAGE, TYPE THE CARD PINS CORRECTLY AND SEND TO 08107431933.
  3. DON'T CALL, JUST TEXT, IF THE CARDS PINS ARE VALID, A REPLY WILL BE SENT TO YOU CONFIRMING THAT YOU HAVE BEEN SUBSCRIBED.
  4. RELAX AND WAIT FOR YOUR ANSWERS 30MINUTES BEFORE EXAM STARTS OR AFTER EXAM STARTS.
  5. NB: DO NOT SEND USED CARD PINS OR YOUR NUMBER WILL BE BLACKLISTED.