A solution containing an ionic compound is subjected to the anion and cation con

Question

A solution containing an ionic compound is subjected to the anion and cation confirmation tests performed in this experiment. Addition of silver nitrate: a bright yellow precipitate formed Flame test: a purple color was observed Identify the ionic compound and write the chemical reaction that occurs when the ionic compound interacts with the silver nitrate. Identify the spectator ions. A solution containing an ionic compound is subjected to the anion and cation confirmation tests performed in this experiment. Addition of silver nitrate: a bright yellow precipitate formed Flame test: a purple color was observed Identify the ionic compound and write the chemical reaction that occurs when the ionic compound interacts with the silver nitrate. Identify the spectator ions. Addition of silver nitrate: a bright yellow precipitate formed Flame test: a purple color was observed Identify the ionic compound and write the chemical reaction that occurs when the ionic compound interacts with the silver nitrate. Identify the spectator ions.

Explanation / Answer

Purple colour is due to potassium ion.

Addition of silver nitrate: a bright yellow precipitate formed: this means iodide ion is present.

So the ionic compound is KI.

Full molecular equation:
AgNO3(aq) + KI(aq) AgI(s) + KNO3(aq)

Full ionic equation:
Ag+(aq) + NO3-(aq) + K+(aq) + I-(aq) AgI(s) + K+(aq) + NO3-(aq)

Now inspect this full ionic equation . Find everything that is identical on both sides of the sign. These are the spectator ions which are: K+(aq) and NO3-(aq)
What is left is the net ionic equation:
Ag+(aq) + I-(aq) AgI(s)

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