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WAEC GCE Jan/Feb Chemistry Practical Expo 2018/WAEC GCE Jan/Feb Chemistry Practical Runs 2018/WAEC GCE Jan/Feb Chemistry Practical Answers and Questions 2018

WAEC GCE Jan/Feb Chemistry Practical Expo 2018, WAEC GCE Jan/Feb Chemistry Runs 2018, WAEC GCE Jan/Feb Chemistry Practical Answers and Questions 2018, WAEC GCE Jan/Feb Chemistry 3 [Alternative to Practical Work] Answers 2018.

WAEC GCE 2018/2019 Jan/Feb Chemistry Practical Exam Schedule

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2)
Test
I. Solution + NaOH in excess
Ii. Solution + NH3 in excess
Iii. Solution + BaCl + HCl in excess
Iv. Solution + AgNO3

Observation
I. White gelatinous precipitate soluble in excess NaOH
Ii. White gelatinous precipitate soluble in excess NH3
Iii. White precipitate formed with BaCl2 which dissolves in excess HCl
iv. White precipitate formed with AgNO3

1ai)
Burrette readings/cm3:|titre 1|titre2|titre3
Final readings |33.20 |49.60 |1.50
Initial readings |16.40 |16.40 |16.65
1aii)
Average volume of acid used
= 16.40+16.40+16.65(cm3)/3
=49.45cm3/3
=16.48cm3

1b)
i) Concentration of Y(OH)2.XH2O in mol/dm3
Using CAVA/CBVB = a/b
CA= 0.025mol/0.25dm3 = 0.1mol
VA = 16.48cm3
CB = ?
VB = 25.00cm3
a = 1mol
b = 2 moles
.:. CAVA/CBVB =a/b
CB = CAVA*B/VB*a
= 0.1 mol/dm3 * 16.48cm3 * 2 moles / 25.00 * 1 mol
CB = 3.296/25
CB = 0.131mol/dm3


3a)
i)Desiccator- use for preserving moisture sensitive items
ii)Volumetric flasks are used for precise dilutions and preparation of standard solutions.
iii)Glass rod are used to mix chemicals and liquids for laboratory purposes.

3ii)
i)Amphoteric is Al2O3
ii)Neutral oxide is H2O
3iii)
Crystallization

3b)
1)hno3aq to cuco3 solid. a light blue solid,
precipitates is formed
2)acidified kmno4 to c2h4. c2h4 is oxidized to ethane-1,2-
diol
3)iodine solution to a paste of unripe plantain. a bluish-black color is produced with iodine

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Chemistry 3 [Alternative to Practical Work] 3:30pm – 5:00pm
The newly introduced waec first series, WAEC GCE January/February Chemistry practical Exam will start on Thursday February 1st 2018, Our plans for you to get Capital A in Chemistry with the help of the practical has been set in place.
Since long ago we have helping candidates all the way from JAMB, WAEC NECO and their GCE, this newly created external exam can not be exempted. WAEC GCE Jan/Feb Chemistry Practical will drop 5 hours before the exam starts. If you are on whatsApp or you want it through SMS, we are there for you.
Promise made to you is that if you fail to receive your questions and answers as stated here request for a refund.

How To Pay For WAEC GCE Jan/Feb Chemistry Practical Questions and Answers Assistance 2018

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