Waec Model Questions Vol1 2022 Chemistry Question 3

Practice essay / theory question 3 from the 2022 Waec Model Questions Vol1 Chemistry examination. This question covers Chemical Bonding .

Waec Model Questions Vol1 2022 Chemistry Essay / Theory

Topic: Chemical Bonding

Question 3 WAEC_MODEL_QUESTIONS_VOL1 • 2022 • CHEMISTRY • essay

Calcium nitrate, Ca(NO₃)₂, is a white crystalline solid. In the solid state it has a high melting point and does not conduct electricity. When it is dissolved in water it dissociates completely and the aqueous solution conducts electricity.

Question Parts

( a )

State the type of chemical bonding present in solid calcium nitrate and give two pieces of evidence from the description to support your answer.

( b )

Write the formula of the nitrate ion and draw its Lewis structure, clearly indicating resonance.

( c )

Using VSEPR theory, predict the shape of the nitrate ion and give the expected bond angle(s).

( d )

Explain why an aqueous solution of calcium nitrate conducts electricity whereas the solid does not.

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About This Question

This is Waec Model Questions Vol1 2022 Chemistry Question 3. It is one of the essay questions from the 2022 Waec Model Questions Vol1 Chemistry examination.

The question covers Chemical Bonding .

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