Neco Model Questions Vol1 2023 Chemistry Question 3

Practice practical question 3 from the 2023 Neco Model Questions Vol1 Chemistry examination. This question covers Chemical Bonding .

Neco Model Questions Vol1 2023 Chemistry Practical
Topic: Chemical Bonding
Question 3 NECO_MODEL_QUESTIONS_VOL1 • 2023 • CHEMISTRY • practical

A student is investigating the nature of bonding in three solid copper compounds: (i) copper(II) sulfate pentahydrate, (ii) copper(II) chloride, and (iii) copper(II) nitrate. The student prepares 0.10 M aqueous solutions of each compound using distilled water, measures their electrical conductivity with a calibrated conductivity meter, and records the values shown in the table below. | Compound | Conductivity (mS cm⁻¹) | |----------|------------------------| | CuSO₄·5H₂O | 1.20 | | CuCl₂ | 1.48 | | Cu(NO₃)₂ | 1.35 | Using the data and additional observations, answer the following questions.

Question Parts

( a )
Classify each compound as ionic, covalent or non‑electrolyte based on the conductivity data and give a brief justification.
( b )
A magnetic susceptibility test on solid copper(II) nitrate shows it to be paramagnetic with a magnetic moment of 1.73 BM. Using this observation together with the conductivity result, deduce the type of bonding present in copper(II) nitrate and justify your answer.
( c )
Suggest one practical precaution that must be observed when preparing the solutions to avoid systematic error in the conductivity measurements, and explain why it is important.

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About This Question

This is Neco Model Questions Vol1 2023 Chemistry Question 3. It is one of the practical questions from the 2023 Neco Model Questions Vol1 Chemistry examination.

The question covers Chemical Bonding .

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