I Will Send you the Correct 2021 Neco Chemistry Practical Questions and Answers, Neco 2021 Chemistry Practical Runs, Neco 2021 Chemistry Practical Expo, Neco 2021 Chemistry Practical Answers with Objective and Essay/Theory Exactly 5 hours Before the Exam. Neco 2021 Chemistry Practical Obj and Essay Questions & Answers
Wednesday 14th July 2021
- Paper I: Practical – Chemistry 10:00am – 12:00noon
READ: 2021 NECO RUNZ/EXPO | 2021 NECO QUESTIONS AND ANSWERS | 2021/2022 NECO RUNS
Wednesday 14th July 2021
Paper I: Practical – Chemistry 10:00am – 12:00noon
Volume of pipette used=25cm3.
Indicator used= Methyl orange
Under Titration, Rough, 1st, 2nd, 3rd,
Final burette reading; |25.00| |23.40| |23.50| 23.60|
Initial burette reading; |0.00| |0.00| |0.00| |0.00|
Volume of A used; |25.00| |23.40| |23.50| |23.60|
Average volume of Acid used=23.40+23.50+23.60/3 =70.5/3=23.50cm3
This is because it is a reaction between a weak acid and strong base
A funnel should be used while transferring the acid into the burette.
Conc of A in mol|dm³ =?
Conc of A in g|dm³ = 12.75g|dm³
Molar mass of A, NaHSO⁴ = 23+1+32+64
Conc(mol/dm³) = conc(g/dm³)/molar mass
Con of B in mol/dm³ =?
Ca =0.106, Cb =? Va =23.50cm³, Vb =25.00cm³
na=1 , nb=1
Conc of B in g/dm³=?
Molar mass of B , NaOH=23+16+1=40g/mol
From; conc(g/dm³)=conc(mol/dm³)*molar mass
Mass of salt formed =?
Recall mole of NaHSO⁴=?
From; mole =con(mol/dm³)*vol(cm³)/1000
Mole=0.0025mol of NaHSO⁴
By proportion 1mol of NaHSO⁴ produce 1mol of Na²SO⁴ 0.0025mol of NaHSO⁴ will produce X mol of Na²SO⁴ X=0.0025*1=0.0025mol of NaSO⁴
Molar mass of Na²SO⁴=(23*2) + 32 + (16*4)
Recall; mole =mole/molar mass
Mass =mole * molar mass
Mass =0.36g of Na²SO⁴
C + 5cm³ of distilled water
It dissolve completely
C is a soluble salt
Solution + NaOH + Heat
Effervescence occurs in which a colourless gas with pungent smell and turns red litmus paper to blue is given off.
NH³ gas from NH⁴+ is present
Stirring rod of HCL + gas given off
a gas which gives a pop sound is given off
H² is present
Solution C + drops of BaCL²
a white precipitate is formed
CO²^-3, SO²^-4, SO²^-3, May be present.
Solution in C(i) + dil HCL
the white precipitate dissolve is dil HCL and effervescence occurs in which a colourless and odourless gas which turns blue litmus red and lime water milky is given off
CO² gas from CO²^3- confirmed
concentrated acid can be defined as an acid formed when a large quantity of an acid dissolve in a small or little volume of water.
A strong acid is defined as a type of acid that ionize completely in a solution
Activated charcoal is used as an adsorbent material
(i)Reddish – Brown
(ii) I – red, II – brown.
Completed!. Promise Fulfilled.
Neco 2021 Chemistry Practical Questions and Answers
We are pleased to inform all Neco students sitting for the 2021 Neco Chemistry Practical Exam that we have the complete Neco 2021 Chemistry Practical Expo with Questions Paper for May/June Neco Examination.
Did you know a good Neco result is your one ticket to admission to any University or Polytechnic of your choice? If you’re directed to this website pls subscribe now and smile while you write your exam.
How to Subscribe for Neco 2021 Chemistry Practical Answers.
Choose from the below subscription price list that best suits you, then send the exact amount as Mtn Recharge Card to us on 07062154881
TEXT MESSAGE: N800
WHATSAPP GROUP: N600
PASSWORD LINK: N400
Related Post » Examkey: Neco 2021 Exam Key Expo Runs Questions & Answers
See How to Make Payment For Neco 2021 Chemistry Practical Expo.
Send the following details:
- Your Mtn Card
- Your Subject Name
- Your Phone Number to 07062154881
Immediately we have confirmed your details, the complete 2021 Neco Chemistry Practical runs will be sent to you.
WHAT YOU MUST KNOW
- If you supply Neco to your students or schools and you will need Neco Chemistry Practical questions paper and answers contact us.
- No website would post free 2021 Neco Chemistry Practical answers online if they got the real questions paper direct from Neco officials like us. Beware of fake websites!!
- Most of the websites posting free Neco Chemistry Practical expo online are posting fake answers or copied ones with little to no knowledge of how it came about.
I HOPE THE DESCRIPTION PROVIDED ABOVE IS ENOUGH TO CONVINCE YOU WE ARE 100% REAL AND LEGIT.
Neco Chemistry Practical Answer 2021, Neco Chemistry Practical 2021, Neco Timetable 2021, Neco 2021 Syllabus, Neco Time Table Download, Neco May June exam Start When, Neco May/June 2021 Registration, Is Neco Registration Still on, Neco Chemistry Practical Nov Dec 2021, Neco Chemistry Practical Answer 2021, Neco Chemistry Practical 2021, Neco 2021 Chemistry Practical, Alternative to Chemistry Practical Past Questions Pdf, 2021 Neco Chemistry Practical Questions and Answers Pdf, 2021 Neco Chemistry Practical Questions and Answers Pdf Download, 2021 Neco Chemistry Practical Questions and Answers