NECO GCE Nov/Dec 2018 Chemistry Practical Expo Answer

 NECO GCE Nov/Dec 2018 Chemistry Practical Expo Answer

Welcome to the Real and Verified NECO GCE Chemistry Practical Questions and Answer – Nov/Dec 2018 Expo Runz.

Start to subscribe for English answer now. English will not be post here free of charge. Those that subscribe will get answer 6 hours before exam start. Our subscribers can confirmed this.

Direct Mobile = N1,000 MTN CARD
Password/Pin Link = N700

Send your card to 08140840635
100% GUARANTEED. NO FREE ANSWER FOR ENGLISH
(1)
Indicator used Methyl Orange 
Volume of burette = 50.00cm3 
Volume of pipette = 25.00cm
(i)
TABULATE:
Titration| 1 | 2 | 3|
First Burette readings (cms) | 21.80 | 21.50 | 24.00
Initial burette reading (cm3) | 01.30 | 01.00 | 03.50
Volume of acid used (cm) | 20.50 | 20.50 | 20. 50
(ii) average volume of A used = 1st + 2nd + 3rd/3
= 20.50 + 20.50 + 20.50/ 3
= 20.50cm3
(iii) Con in g/dm3 = 4.0g/dm3
Con + B moldm-3 = Conc in g/dm-3/molar mass
= 4/40 = 0.1moldm-3
Molar mass of NaOH ==> 23 + 1c + 1
= 40g/mole
Conc of B is 0.1moldm-3
(biii)
Concordant readings are the readings within 0.20cm3 of each other 
(iv)
Methy orange is used because te titration is between or involving strong acid and strong base 
(v)
– I ensure I took the measure below menisons 
– I avoided shaking of pipette while the reading is going on
(vi)
NaOH is soapy to touch 
(1ci)
(i) A is a mono base acid since the mole is 1
A could be HCL, HNO3
(cii)
Equation of the reaction is NaOH +2HCL ==> NaCl + H2O
(2a)
C is soluble salt
(2ai)
– Zn^2+ or Al^3+ present
– Zn^2+ or Al^3+ present
(2aii)
– Zn^2+ or Al^3+ present
– Zn^2+ is confrim
(2bi)
SO3^2- or SO4^2-present
(2bii)
SO3^2- present
(2biii)
SO3^2- confrim
(2c)
ZnSO3
(3a)
(i) Co2 can be removed by adding canstic soda i.e sodium hydroxide
(ii) purity of water can be determined through it boiling point as it is noted that pure water boils at 100oc
(iii)
AgN03 produce brown fumes as NO2 is produced on heating as 2AgNO3 (s) ==> 2Ag(s) + O2(g) 2NO2(g)
(iv) 
It changes the litmus paper red as the hydrogen ion in the wet litmus forms as acid on exposure to the litmus paper.
(3b) 
(i) it don’t like drowing
(ii) it cannot be collected by displacement of air because nitrogen constitutes to large percentage of the air constitutes (78%)
(iii) HCL gas or ammonia gas
Start to subscribe for English answer now. English will not be post here free of charge. Those that subscribe will get answer 6 hours before exam start. Our subscribers can confirmed this.
Direct Mobile = N1,000 MTN CARD
Password/Pin Link = N700

Send your card to 08140840635
100% GUARANTEED. NO FREE ANSWER FOR ENGLISH
=========================

Expospy.com posts all exam expo answer earlier than others
============================
============================

GOODLUCK!!!

NECO GCE ssce 2018 Chemistry Practical expo answers, Ssce 2018 Chemistry Practical Practical Expo answers now available, nov/dec Chemistry Practical theory Answers for 2018, Chemistry Practical Practical Questions NECO GCE Ssce Expo Answers Here, Free wassce Chemistry Practical objective, essay & theory correct Expo 2018 answers Runz NECO GCE Chemistry Practical, NECO GCE Ssce 2018 Free Chemistry Practical essay, Practical Questions and Answers Expo for NECO GCE Chemistry Practical Paper 1 and Paper 2 Practical Questions and Answers Expo Now Posted, Free Chemistry Practical objective ans for internal ssce, see NECO GCE ssce expo Chemistry.

Add a Comment

Your email address will not be published. Required fields are marked *