# MAY/JUNE WAEC CHEMISTRY PRACTICAL ANSWERS 2023/2024

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WAEC Chemistry practical specimen Answers 2023 has been solved here.

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### 2023 WAEC CHEMISTRY PRACTICAL ANSWERS

Volume of Acid used (cm³)24.6024.5024.5024.50

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%

= 62.8%

Related Content:

• I don’t understand what you wrote that 500cm³ of Na2CO3.xH2O contains5.0g
1000cm³contains 12g

• INIMFON AFIA says:

Yeah…that doesn’t hold water.
I can’t fix how 12 g/dm3 came about?

• Udoh promise says:

U can use total mass of water of crystallization/molmass times 100

• Nwanze Pamela says:

Same as me because I know that initial reading is 0.00all through.

• Syke says:

Chaii
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

• Azike Gerald says:

I think it’s part of the question

• WAEC officer says:

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• WAEC says:

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• Tofunmi64 says:

Please can you send it to me

• Theodore says:

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

• WAEC officer says:

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What it gets

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• WAEC says:

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• olayiwola muhammed says:

me i dont even understand

• Anonymous says:

Nope

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

• Hanafi habeeb says:

Plz I need a repl

• Hanafi habeeb says:

Plz sir tell us the truth

• Love Amazing says:

Can you pls show me how to prepare the solutions and carry out the practical myself?

• Esther says:

They are d likely questions
Just study them

• INIMFON AFIA says:

Is there any question given in the entire write up?

• Clement says:

I need the 2023 waec English answers

• Trojan says:

Me too pls don’t forget English Oo

• Miracle says:

I need the 2023 waec mathematics answers and thanks for this one.

• I need all answer for waec

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I need 2023 math and English WAEC question and answer

• Shina says:

Haaaa! Future exam questions? 🙄

• Klo says:

Shut the fuck up bitch.

• Pyt says:

I don’t understand

• Abraham B KOLLEH says:

Thank you for your good work but we all the subjects please mathematics and English

• husseina says:

thanks you for the good work, may God bless you,.

• husseina says:

thanks for the good work

• Ayaowei says:

Show your Conc of acid is gotten

• Ayaowei says:

Pls show us how the concentration of the acid is gotten..

• Smart says:

Not actually depends on the end point your school is using

• Eyit joy says:

Thanks very much sir

• Anjolaoluwa says:

Are this answers really true ???

• Goodness says:

Hi I need mathematics question and answer

• Esther says:

Pls sir is there how you can notify us if anything else is out.

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TO GET THE 2023 WAEC CHEMISTRY PRACTICAL QUESTIONS AND ANSWERS,CALL OR MESSAGE 08024485178 ON WHATSAPP NOW

• Hyelnasinyi Francis says:

I need chemistry practical answers for today

• Bas says:

Thanks for the good work sir

• Bas says:

Please sir, can we also see igbo question paper 🙏

• J says:

English,maths,physics, chemistry, biology

• What about the salt analysis practical

• Frank says:

Thanks for the good work

• Emmy neo says:

Thank you very much,we need Economics too

• Fega says:

Please sir i need the chemistry obj and theory question and answers

• Isaac peculia says:

Thank u Sir

• Perpetual says:

But sir, why is the mass concentration 12g|dm³ and not 10g|dm³?

• MERCY says:

Because that is what the questions told us

• Perpetual says:

But sir the value of x suppose to be 7.34

• Perpetual says:

Because 5.0/0.5/1000=5.0/0.5=10g|mol

• Swifty says:

Nice job sir

• Elmor says:

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?

• Elmor says:

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 .

• Prince says:

I need help

• lil lynx says:

Add me up to the group on whatsapp
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• Victoria says:

Sir, these are the only questions on chemistry practical

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• Israel says:

Please how did they get the molar mass I don’t understand

• Donald says:

Thank you very much for your help,pls when is igbo questions coming out the exam is tomorrow

• Omowunmi Oluokun says:

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

• Ifeoluwa says:

Thanks for the update

• OK if we can create a group for interested one’s. I think it will help us .

• Okikiola says:

Really appreciate you
How can I join the WhatsApp group,I will pay

• Reel chase says:

• Favour says:

Is it possible to get other subjects

• Ogunleye gold is says:

Thank you so much , but I need the English questions right now please

• Sunday says:

09126853324

• Merit says:

Pls chemistry is my problems

• Valentine says:

How did you get your Na2CO3.xH2O

• Anonymous says:

Like i don’t understand how

• Valentine says:

How did you get your Na2CO3.xH2O =12

• Charity says:

I am interesting add me 08130091770

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• Samuel says:

How do I join the group

• Lawal says:

Pls can u explain hw u got 12g/mol

• MERCY says:

How is Ca = 0.086
I was getting 0.082 and it is really changing my answers

• Y.B!!! says:

The molar concentration is supposed to be 10 and not 12

• Anonymous says:

That’s true

• Bethel says:

Add me up in the group on WhatsApp
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• Sigh* I wish it was more clearer man😉

• mercy iliya says:

Thanks sir for this I will like u to send more subjects on this gogle group