Neco Model Questions Vol1 2025 Chemistry Question 3

Practice practical question 3 from the 2025 Neco Model Questions Vol1 Chemistry examination. This question covers Chemical Bonding .

Neco Model Questions Vol1 2025 Chemistry Practical

Topic: Chemical Bonding

Question 3 NECO_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • practical

A sample of an unknown metal oxide (formula MxOy) weighing 2.00 g is heated strongly in a crucible until no further change in mass occurs. After heating, the mass of the remaining metal is 1.21 g. The oxide is insoluble in water, but when the metal obtained is dissolved in dilute hydrochloric acid, the resulting solution conducts electricity readily. The metal chloride formed is soluble in water. Using the data provided, answer the following questions.

Question Parts

( a )

Calculate the empirical formula of the oxide.

( b )

Determine the percentage by mass of the metal in the oxide.

( c )

Based on the observations (insolubility of the oxide, solubility of the metal chloride, and the conductivity of its aqueous solution), state the type of chemical bonding present in the oxide and justify your answer.

( d )

Suggest one reliable experimental method that could be used to confirm the oxidation state of the metal in the oxide.

Detailed Solution & Marking Scheme

Get the step-by-step solution, key points required by examiners and detailed marking guidance through the Edcrib AI Tutor.

Reveal Answer

About This Question

This is Neco Model Questions Vol1 2025 Chemistry Question 3. It is one of the practical questions from the 2025 Neco Model Questions Vol1 Chemistry examination.

The question covers Chemical Bonding .

View More Neco Model Questions Vol1 2025 Chemistry Questions More Neco Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows

Chat with Support