The diagram shows the setup of an experiment. A few observations of the experiment are listed in the table below the diagram.

A beaker filled three-fourths with a liquid labeled colorless silver nitrate solution is shown. A small strip is shown inside the beaker. The strip is labeled copper strip. The title of the image is Experimental Setup.

Experimental Observations
Observation Description
1 Solution turned blue
2 Gray particles were deposited on the edge of the strip

Which of the following is the correct explanation for one of the given observations?
Observation 2 is a result of nitrate ions moving into the solution.
Observation 1 is a result of copper ions moving into the solution.
Observation 1 is a result of silver atoms losing one electron.
Observation 2 is a result of silver ions losing one electron.

The solubility of a metal in another is determined by their relative positions in the electrochemical series. The metals that are higher above in the electrochemical series displaces the metals that are lower in the electrochemical series.

Copper is higher than silver in the electrochemical series hence copper displaces silver in the electrochemical series. Therefore, the correct explanation for an observation is that;

Observation 1 is a result of copper ions moving into the solution.

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