Neco Model Questions Vol1 2017 Chemistry Question 4

Practice essay / theory question 4 from the 2017 Neco Model Questions Vol1 Chemistry examination. This question covers Mole concept, Molar mass, Stoichiometry, Precipitation reactions .

Neco Model Questions Vol1 2017 Chemistry Essay / Theory
Topics: Mole concept Molar mass Stoichiometry Precipitation reactions
Question 4 NECO_MODEL_QUESTIONS_VOL1 • 2017 • CHEMISTRY • essay

A crystalline solid has been analysed and its composition is represented by the structure shown in the illustration. The solid is a hydrate of a transition‑metal complex. Using the diagram, answer the following questions.

Question Parts

( a )
Write the correct molecular formula of the compound, including the water of crystallisation.
( b )
Calculate the molar mass of the compound (to three significant figures).
( c )
A 5.00 g sample of the compound is dissolved in water. Calculate:
( ) The number of moles of Cr present.
( ) The mass of chloride ions (both coordinated and counter‑ions) present in the sample.
( d )
The solution is treated with excess silver nitrate, precipitating all chloride ions as AgCl. Calculate the mass of AgCl that would be formed from the 5.00 g sample.

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About This Question

This is Neco Model Questions Vol1 2017 Chemistry Question 4. It is one of the essay questions from the 2017 Neco Model Questions Vol1 Chemistry examination.

The question covers Mole concept, Molar mass, Stoichiometry, Precipitation reactions .

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