WAEC Chemistry practical specimen Answers 2023 has been solved here.
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2023 WAEC CHEMISTRY PRACTICAL ANSWERS
|Burette Readings||Rough||1st Titration||2nd Titration||3rd Titration|
|Final burette readings (cm³)||25.60||48.10||24.60||24.80|
|Initial burette readings(cm³)||1.00||23.60||0.10||0.30|
|Volume of Acid used (cm³)||24.60||24.50||24.50||24.50|
Volume of A used = 1st + 2nd + 3rd/3
Average Volume of A used = 24.50+24.50+24.50/3
Average volume of A used = 73.50cm³/3 = 24.50cm3
Write the Equation of the reaction
Na2CO3•xH2O + 2HCl → 2NaCl + H2O + CO2
Mole ratio of base to acid = 1 : 2
500cm3 of Na2CO3 XH2O Contain 5.0g
1000cm3 will contain 5/500 x 100/1 = 12gdm3
therefore Mass Concentrated of Na2CO3 XH2O = 12gdm3
b) Molar Concentration of anhydrous Na2CO3 in solution B
Cb = CaVaNb/VbNa
Cb = 0.086 x 24.50 x 1/25 x 2
Cb = 0.0421m
c) Find the Value of X
Na2CO3•xH2O = 12.0g/dm3
Molar Concentration = 0.0421mol/dm3
Molar Mass = Mass Concentration/Molar Conc.
Molar Mass = 12.0g/dm3/0.042mol/dm3
Molar Mass = 285.7g/mol
Value of X
Na2CO3•xH2O = 285.7g/mol
Na2CO3 = 106g/mol
H20 = 18g/mol
106 + (X *18) = 285.7g/mol
18x = 285.7g/mol – 106g/mol
x = 285.7 – 106/18
x = 179.7/18
x = 9.9 approximately 10 ( since x must be whole number)
Percentage of Water of Crystallization.
Mass of water/Mass of hydrated salt x 100%
= 179.7/285 x 100%
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I don’t understand what you wrote that 500cm³ of Na2CO3.xH2O contains5.0g
Yeah…that doesn’t hold water.
I can’t fix how 12 g/dm3 came about?
U can use total mass of water of crystallization/molmass times 100
Same as me because I know that initial reading is 0.00all through.
Bruh,titre value can start anyhow guyyy 😂😂😂
And nah like this you wanna write chemistry practical😓😁
exactly what i got is 10 and the equation they wrote what was the need for them to write X when in the real waec question from my teacher they have already written 10 but they are saying X
I think it’s part of the question
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Ok please can I have the WhatsApp number
Ok please can I have the WhatsApp number
Fake questions nah wetin una dey send
Shit the fuck up kid
WAEC chemistry questions and answers will drop to night
Only for those who will pay
Please can you send it to me
We are meant to look for mass conc there and you know that it is= mass ÷volume(in dm-3) so there for divide it and multiply by 1000 because the “cm-3” need to be converted to “dm-3
If you want it
What it gets
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Are dis answers really True??
Pls I need a reply from someone
Yeah, it’s talky with the practical guide I was given as a subject teacher…and I have also gotten through their solutions..it’s all fine
Plz I need a repl
Plz sir tell us the truth
Can you pls show me how to prepare the solutions and carry out the practical myself?
They are d likely questions
Just study them
Is there any question given in the entire write up?
I need the 2023 waec English answers
Me too pls don’t forget English Oo
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I need all answer for waec
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Haaaa! Future exam questions? 🙄
Shut the fuck up bitch.
I don’t understand
Thank you for your good work but we all the subjects please mathematics and English
thanks you for the good work, may God bless you,.
thanks for the good work
Show your Conc of acid is gotten
Pls show us how the concentration of the acid is gotten..
Not actually depends on the end point your school is using
Thanks very much sir
Thanks, but I need the main questions for volumetricanalysis
I really appreciate your forum
Are this answers really true ???
Hi I need mathematics question and answer
I need English essay and objectives for WAEC 2023
Pls sir is there how you can notify us if anything else is out.
I need Igbo language and English language question and answer
TO GET THE 2023 WAEC CHEMISTRY PRACTICAL QUESTIONS AND ANSWERS,CALL OR MESSAGE 08024485178 ON WHATSAPP NOW
I need chemistry practical answers for today
Thanks for the good work sir
Please sir, can we also see igbo question paper 🙏
English,maths,physics, chemistry, biology
I like it
What about the salt analysis practical
Yesooo we need it
Thanks for the good work
Thank you very much,we need Economics too
Please sir i need the chemistry obj and theory question and answers
Thank u Sir
But sir, why is the mass concentration 12g|dm³ and not 10g|dm³?
Because that is what the questions told us
But sir the value of x suppose to be 7.34
Nice job sir
The mass concentration of the hydrated salt , that is, Specimen B, is given as 5g/dm3 by WAEC. From where did you get 5g/500cm3, which you converted to 12g/dm3?
From the list of specimens and instructions for Practical Chemistry from WAEC, we can see that 5g of B is to be dissolved in 1 dm3. So the mass concentration of B is 5g/dm3.
From calculations using the instructions from WAEC, the molar concentration of A is 0.10 mol/dm3.
Based on the above data, the volume of acid will be much lower .
I need help
Thank u very much nkedugist boss
Add me up to the group on whatsapp
Pls add me to the group on Whattsapp
Sir, these are the only questions on chemistry practical
TO GET THE 2023 WAEC CHEMISTRY PRACTICAL QUESTIONS AND ANSWERS,CALL OR MESSAGE 08024485178 ON WHATSAPP NOW.
NO TIME TO WASTE
Please how did they get the molar mass I don’t understand
Thank you very much for your help,pls when is igbo questions coming out the exam is tomorrow
I really appreciate this but we don’t have to depend on this
We have to work harder on our own
Like that one they wrote 12gdm/3
Let assume we didn’t go through the solutions
Some fools are still going to write it like that
So pls guys don’t let us depend on this
I beg of u
I will pay but teach me on Whatsapp
Thanks for the update
Please how can I join the group
OK if we can create a group for interested one’s. I think it will help us .
Isn’t that OK
Really appreciate you
How can I join the WhatsApp group,I will pay
Why can’t you write the questions,we don’t need your answers
Is it possible to get other subjects
Thank you so much , but I need the English questions right now please
I’m interested add me
Pls chemistry is my problems
How did you get your Na2CO3.xH2O
Like i don’t understand how
How did you get your Na2CO3.xH2O =12
I am interesting add me 08130091770
2023 FULL CHEMISTRY PRACTICAL QUESTIONS AND ANSWERS ARE NOW AVAILABLE…
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How do I join the group
Pls can u explain hw u got 12g/mol
How is Ca = 0.086
I was getting 0.082 and it is really changing my answers
The molar concentration is supposed to be 10 and not 12
Add me up in the group on WhatsApp
Sigh* I wish it was more clearer man😉
Thanks sir for this I will like u to send more subjects on this gogle group