NECO Chemistry Practical 2024 Questions and Answers
NECO Chemistry Practical 2024 Questions and Answers
NECO Chemistry Practical 2024 Questions and Answers
1ai) Methyl Orange Reason:- Titration of strong acid against base 1aii)Yellow 1aiii)Hydrochloricacid 1aiv)2HCL(aq)+ x2Co3 -> 2 x CLaq + H20(aq) + CO2(g) 1b) Molar mass of HcL = 1+35.5 =36.5gmol^-1 Con of A is moldm^-3 = Con of A of gdm^3/molar mass in gdm^3 =7.30gdm^-3/36.5gmol^-1 =0.200moldm^-3 1bii) using CAVA/CBVB = a/b CA = 0.200mol/dm^3 VA = 26.20cm^3 Cb = ? VB = 25.0cm^3 a = 2mols b = 1mol 0.200mol/dm^3 x 26.2cm^3/Cb x 25.0cm^3 = 2mols/1mol Cb = 0.200×26.20×1/25.0×1 Cb = 5.24/25.0mol/dm^3 Cb = 0.2096mol/dm^3 1biii) Conc. of B in gdm-3/Conc. of B in mol/dm-3 =10.6gdm-3/0.148 gdm-3 =101.15g =101gmol-1 2ai) INFERENCE: Sample X is a soluble salt 2aii) OBSERVATION: A gas is evolved. The gas turns red moist litmus blue. It forms white fumed when NaOH solution was added was added INFERENCE: Alkaline gas 2aiii) INFERENCE: CO3 gas is CO3^2- 2aiv) INFERENCE: The solution is alkaline 3a) i)NH4CL and AgNo3 ii)ZnCo3 iii)Fes iv)AgNo3 v)NH4Cl 3b) – Burrette – Reshort Hand – Solution/Acid – Conical Flask READ MORE.. . NECO GCE Marketing 2024 Questions and Answers Posted READ MORE… NECO GCE Data Processing 2024 Questions & Answers If you need us to help you with updated questions and answers at the right time about NECO Chemistry Practical 2024 Questions and Answers, kindly Subscribe with us here, you can also use your phone number and email address in the comment box below to ask any question pertaining to this guide.Categories: NECO SSCE Syllabus Questions
0 Responses