11 Questions
What is the purpose of adding chlorine to the Fe(II) solution?
To oxidize Fe(II) to Fe(III)
What is the indication of the presence of Fe 3+ ions in a solution?
An orange-brown precipitate
What is the outcome of adding Iron II sulphate and concentrated sulphuric acid to a solution containing nitrate ions?
A brown ring is formed near the bottom of the test tube
What is the result of adding ammonia to a solution containing chloride ions?
The precipitate dissolves
What is the purpose of boiling a solution containing carbonate ions?
To liberate carbon dioxide
What is the indication of the presence of sulfite ions in a solution?
A white precipitate that dissolves in dilute HCl
What is the result of adding concentrated nitric acid to a solution containing phosphate ions?
No reaction occurs
What is the definition of oxidation?
The loss of electrons
What is the purpose of adding BaCl₂ to a sulphite solution?
To form a white precipitate
What is the definition of a reducing agent?
A substance that loses electrons
What is the purpose of adding dilute HCl to a sulphite solution?
To dissolve the white precipitate
Understand the basics of oxidation and reduction reactions, including the loss and gain of electrons, and common oxidising agents such as oxygen and potassium permanganate. Learn how to identify and explain oxidation and reduction reactions.
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