NECO 2020 Chemistry Practical Solution Answer/Questions Expo

NECO 2020 Chemistry practical expo answer, verified NECO Chemistry practical expo,NECO Chemistry practical Expo Answer,NECO Chemistry practical expo, NECO Chemistry practical runs, Chemistry practical expo NECO 2020, 2020 NECO Chemistry practical answer

NECO CHEMISTRY PRACTICAL QUESTION & ANSWER SOLUTION - 2020 EXPO RUNZ

VERY IMPORTANT INFORMATION FOR NUMBER 1

PLEASE REMEMBER TO USE YOUR SCHOOL'S AVERAGE TITRE VALUE(AVERAGE VOLUME OF ACID). WE USED 21.47cm3, TRY TO KNOW YOUR SCHOOL'S AVERAGE TITRE VALUE. ASK YOUR CHEMISTRY TEACHER. THEN, ANYWHERE YOU SEE 21.47cm3 IN MY CALCULATION, PUT YOUR SCHOOL'S OWN AND RE-CALCULATE. THIS IS VERY IMPORTANT!!!

---

(1)
Volume of pipette is 25.00cm³

Titrations |Rough| 1 | 2 | 3
Final Reading|23.00|21.50|21.40|21.50
Initial Reading|0.00|0.00|0.00|0.00
Vol. Of acid used|23.00|21.50|21.40|21.50

(1a)
Vol of acid used VA = 21.50+21.40+21.50/3
= 21.47cm³

(1bi)
Conc. Of A in g/dm³ = 3.65÷500/1000 = 7.3g/dm³
Conc. of A in mol/dm³ = gram conc/molar mass
= 7.3/[1+35.5] = 7.3/36.5
=0.2mol/dm³

(1bii)
Using CAVA/CBVB = nA/nB
0.2×21.47/CB×25.00 = 2/1
CB = 0.2×21.47/25.00×2
= 0.08588mol/dm³

(1biii)
Molar mass of B = gram conc/molarity = 10.60/0.08588
=123.43g/mol

(1biv)
X2CO3 = 123
2[X] + 12 + 3[16] = 123
2x + 60 = 123
2x = 123 - 60 = 63
X = 63/2 = 31.5

(1bV)
No of moles of X2CO3 = molarity × volume
= 0.08588 × 25
= 2.147moles

Mole ratio of X2CO3 to CO2 is 1:1
Therefore, No of moles of CO2 released = 2.147moles
Volume of CO2 released = 2.147 × 22.4
=48.1dm³
CLICK HERE FOR THE IMAGE
CLICK HERE FOR THE IMAGE

---

(2ai)
Tabulate:
TEST: C + 5cm³ of distilled water and shake thoroughly. Divide the solutions into three portions.

OBSERVATION: A pale green solution results

INFERENCE: Salt is soluble

(2aii)
TEST: To the first portion add NaOH solution in drys

OBSERVATION: Dark green gelatinous was formed

INFERENCE: Fe²+ present

(2aiii)
TEST: then in excess

OBSERVATION: Precipitate is insoluble

INFERENCE: Fe²+ present

(2aiv)
TEST: To the second portion add K3Fe(CN)6 solution

OBSERVATION: A dark blue precipitate formed

INFERENCE: Fe²+ confirmed

(2bi)
TEST: To the third portion add AgNO³ solution

OBSERVATION: White Precipitate formed

INFERENCE: SO4²- , CL- CO²- present

(2bii)
TEST: To the results obtained in add dilute HNO3 in drops , then excess

OBSERVATION: White Precipitate is insoluble

INFERENCE: CL- present

(2biii)
TEST: To the results obtained in add NH3 solution

OBSERVATION: White Precipitate dissolves

INFERENCE: CL- Confirmed

---

(3)
CLICK HERE FOR THE IMAGE

---

COMPLETED - GOODLUCK

CHEMISTRY PRACTICAL QUESTIONS 👇

=========================

042tvseries.com posts all exam expo answer earlier than others
============================

GOODLUCK!!!

NECO ssce 2020 Chemistry Practical expo answers, Ssce 2020 Chemistry Expo answers now available, May/June Chemistry Answers for 2020, Chemistry Questions NECO Ssce Expo Answers Here, Free SSCE Chemistry Essay objective, essay & Practical correct Expo 2020 answers Runz NECO Chemistry Practical, NECO Ssce 2020 Free Chemistry Practical essay, Practical Questions and Answers Expo for NECO Chemistry Practical Paper 1 and Paper 2 Practical Questions and Answers Expo Now Posted, Free Chemistry Practical objective ans for internal ssce, see NECO ssce expo Chemistry , essay questions for free, loadedexpo correct SSCE Chemistry ans, sure NECO GCE ssce Chemistry Practical obj answers runz runs expo free real and correct NECO ssce 2020 May/June Chemistry Practical free expo runz runs ans answers online for free see free answers online, 2020 Verified NECO Free Ssce Chemistry Answers have been posted REAL NECO SSCE Chemistry Practical QUESTIONS & ANSWERS Direct To Phone Number AS Text message, RE: 2020 SSCE Chemistry essay (Expo) NECO 2020 certified runs Chemistry Practical questions and answers NECO SSCE November/December 2020 Chemistry / ESSAY / OBJ QUESTION AND EXPO I need NECO ssce free expo site, how can I get NECO Chemistry Practical answer for free, NECO 2020 Chemistry Practical essay, Objective And Practical Question and Answer Now Posted, Real 2020/2020 May/June SSCE NECO Chemistry Practical objective, essay and Practical 100% correct expo questions and answers runz chokes runs, verified 2020 NECO Chemistry , essay and obj NECO Chemistry Practical expo website, NECO ssce Chemistry essay live cheats, sure November/December NECO SSCE 2020 Chemistry essay original objective, NECO Free Chemistry answers Practical and essay questions and answer now available here, 100% NECO ssce Chemistry Practical expo, 2020 SSCE Chemistry Practical obj, essay and Practical runz now posted, correct NECO ssce Chemistry Practical objective, essay (Practical) answer now ready, free 2020 SSCE Chemistry Practical obj, Practical and essay best expo site NECO ssce Chemistry Practical questions and answers, password for certified NECO ssce Chemistry Practical essay Practical obj expo, how to get/ where to get SSCE Chemistry, Expospy NECO Chemistry Practical, Expospy NECO 2020 Chemistry Practical, examrelief NECO Chemistry Practical answer, NECO2020 Expospy Chemistry Practical answer, school.naijagreen NECO Chemistry Practical answer 2020, wakagist NECO 2020 Chemistry Practical answer, wakagist Chemistry Practical answer, naijaexam NECO Chemistry Practical answer, essay and objective expo answer direct to my phone as text message, trusted NECO ssce Chemistry Practical questions and answer, i need NECO Ssce May/June Chemistry Practical essay Practical objective obj Expo 2020 answers on whatsapp, gidifans Chemistry Practical answer, NECO English Test of Orals answer 2020, solutionclass Chemistry Practical answer, Expospy Chemistry Practical answer, codedexam NECO Chemistry Practical answer, wapbaze Chemistry Practical answer, wapextra Chemistry Practical expo, Martinlibrary Chemistry Practical expo, examgists NECO Chemistry Practical expo, NECO Chemistry Practical objectives answer, naija NECO Chemistry Practical expo free answer.