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NECO GCE Chemistry Practical 2021 Question & Answers Now Available

NECO GCE Chemistry Practical 2021 Answers

NECO GCE Chemistry Practical 2021 Question & Answers Now Available 1

NECO GCE Chemistry Practical Expo Answers 2021: Hello Dear, welcome to Funloaded, your best NECO GCE 2021 exam help desk. It’s just a few hours before the exam.

Welcome to the NECO GCE Chemistry Paper I (Alternative to Practical) Answers to Questions for the years 2021-2022. Today is the last day of the NECO GCE Chemistry Practical expo.

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2021/2022 NECO GCE Chemistry Practical Questions: Chemistry Practical NECO GCE Expo Questions is out now on our website. In this article, I will be showing you the recent NECO GCE Chemistry Practical questions with answers.

BUT IF YOU THINK WHAT YOU’VE READ AND WHAT YOU’VE BEEN TAUGHT BY YOUR TEACHER IS ENOUGH TO TACKLE NECO GCE Chemistry Paper I (Alternative to Practical) QUESTIONS SET BY PROFESSORS, THEN GO AND RISK IT, I PRAY YOU WON’T REWRITE THESE EXAMS AGAIN. BUT KNOW THAT SUCCESS IS YOUR VICTORY”

You will also understand how NECO GCE Chemistry Paper I (Alternative to Practical) is set and many more examination details. All you need to do is to stay focused and follow this guide.

NECO GCE Chemistry Practical Answers Latest Update

NECO GCE CHEMISTRY
(1ai)
Methyl orange

(1aii)
The titration is between strong acid and weak base

(1aiii)
(i) volumetric flask
(ii) conical flask

(1aiv)
I – Yellow
II – Pink.

(1bi)
500cm³ contains 0.1mole
:. 1000cm³ will contain
= 0.1/1000/500
= 0.2mol/dm³

(1bii)
Molar mass of HCl = 1+35.5 = 36.5g/mol
Concentration of A in mol/dm³
= Conc. Of A in g/moldm-³/Molar mass of A
0.2 = Conc. Of A in g/moldm-³/36.5
Conc. of A in g/dm³ = 0.2*36.5
= 7.3g/dm³

(1biii)
CAVA/CBVB = nA/nB
CB = CAVAnB/VBnA
CB = 0.22451/252
CB = 0.098mol/dm³
:. Concentration of B in moldm-³ = 0.098mol/dm³

(1biv)
Concentration of B in g/dm³
250cm³ contains 7.15g of Na2CO3.nH20
:. 1000cm³ will contain
= 7.15*1000/250 = 28.6g/dm³

(1bv)
Volume of N in Na2CO3.nH20
Conc. of B in mol/dm³ = Conc. of B in g/dm³/Molar mass
0.098 = 28.6/Molar mass
Molar mass = 28.6/0.098
= 291.84g/mol
Na2CO3.nH20 = 291.84
(233)+12+(163)+n((1*2)+16) = 291.84
46+12+8+18n = 291.84
106+18n = 291.84
18n = 291.84 – 106
18n = 185.84
n = 185.84/18 = 10.3
n = 10

(1bvi)
Percentage of water of crystallization = 10H2O/291.84 * 100/1
= 10(18)/291.84 = 180/291.84

= 61.7%

(2ai)
OBSERVATIONS;
C dissolved in distilled water to form solution

(2aii)
INFERENCE
Ca²+, Pb²+, Al³+ or Pb²+ present

(2aiii)
INFERENCE
Ca²+ present

(2aiv)
INFERENCE
Ca ²+ present

(2av)
OBSERVATIONS
a white precipitate is formed

(2bi)
INFERENCE
Co² gas from Co²,³ ^- or HCO^-³ confirmed

(2bii)
INFERENCE
Co² gas confirmed

(2biii)
INFERENCE

Ca O present

(3ai)
(i) Soda like is used because it does not attack glass
(ii) The delivery tube is withdrawn immediately heating is stopped to prevent the sucking back of water into the flask

(3aii)
(i) This is due to the formation of metallic silver which changes the colour to grey
(ii) A white fumes are formed

(3b)
(i) Retort stand
(ii) Separating funnel

(iii) Separating funnel method

Completed!.

(3ai)

(i) Soda like is used because it does not attack the glass

(ii) The delivery tube is withdrawn immediately heating is stopped to prevent the sucking back of water into the flask

(3aii)

(i) This is due to the formation of metallic silver which changes the colour to grey

(ii) A white fumes are formed

(3b)

(i) Retort stand

(ii) Separating funnel

(iii) Separating funnel method

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Conclusion on NECO GCE Chemistry Practical 2021 Question

Please note that the answers presented in this post is a guide to the forthcoming national examination council NECO GCE exam Chemistry Practical. We have prepared it to aid the student in preparing for the practical. If you have any questions about the NECO GCE 2021 Chemistry Paper I (Alternative to Practical) questions and answers, kindly let us know in the comment box

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