3. Complete each of the following items that coincide with the observations.Observations:water

3. Complete each of the following items that coincide with the observations.


  1. water

added to Cu- became a very transparent sky blue color

adding 4 drops of NH3(aq)- gives an opaque milky blue coloradding the rest of NH3(aq)- becomes a transparent royal blue colorethanol added- becomes a purplely-blue (lavender) with deposits of precipitate

a) After adding water to CuSO4 (s), write the balanced physical reaction that was observed.

Given: This is a salt dissolving in water.

(b) After adding a few drops of NH3 (aq) to the salt solution, write the balanced chemical reaction that was observed.

Given: The NH3 (aq) has already reacted partially with water in order to produce some ammonium ions NH4 + (aq) and some hydroxide ions OH- (aq) according to the following reaction: NH3 (aq) + H2O (l) –> OH- (aq) + NH4 + (aq). For the reaction I would like you to write and that coincides with the observation made at this step, complete the net ionic reaction between ‘OH- (aq)’ and ‘Cu2+ (aq)’, as written here: Cu2+ (aq) + OH- (aq) –> ?

(c) After adding the remaining NH3 (aq), write the balanced chemical reaction that was observed.

(d) After adding the ethyl alcohol, write the balanced chemical reaction that was observed. Write ‘ethyl alcohol’ on top of the reaction arrow when writing the reaction.

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