Neco Model Questions Vol1 2024 Chemistry Question 1

Practice practical question 1 from the 2024 Neco Model Questions Vol1 Chemistry examination. This question covers Atomic Structure .

Neco Model Questions Vol1 2024 Chemistry Practical

Topic: Atomic Structure

Question 1 NECO_MODEL_QUESTIONS_VOL1 • 2024 • CHEMISTRY • practical

A student is given an unknown metallic element X. The following experimental procedures are carried out: 1. A small amount of the metal is introduced into a non‑luminous Bunsen‑burner flame and the colour of the flame is observed. 2. Approximately 0.500 g of the metal is placed in a 250 mL conical flask, 50 mL of dilute hydrochloric acid (≈0.10 M) is added and the mixture is allowed to react completely. The gas produced is collected over water in a gas syringe at 25 °C and 760 mmHg. The volume of gas collected is 112 mL. Using the observations and data, answer the questions that follow.

Question Parts

( a )

The flame observed is a bright reddish‑orange colour. Identify the metal X.

( b )

Write the balanced chemical equation for the reaction of X with dilute HCl.

( c )

Using the data provided, calculate the molar mass of X and state whether the result supports the identification made in part (a). (R = 0.0821 L·atm·mol⁻¹·K⁻¹; 1 atm = 760 mmHg; T = 298 K.)

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About This Question

This is Neco Model Questions Vol1 2024 Chemistry Question 1. It is one of the practical questions from the 2024 Neco Model Questions Vol1 Chemistry examination.

The question covers Atomic Structure .

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