Reaction of copper metal with silver ion. when copper metal is placed in a solution of silver nitrate, a redox reaction forms silver metal and a blue solution of copper(ii) nitrate. why does this solution turn blue?

Explanation:

The ionic reaction of the copper and the silver ions is shown below:

Copper gives up 2 electrons and transfers to 2 silver ions which gives solid silver (reduction) and copper (II) ions.

The blue color of the solution is due to the formation of copper (II) ions. The electrons in the copper ion shows d-d transition which absorbs light in the visible region and shows blue color.

the tides are influenced by both the moon and the sun, it's easy to see that when the sun lines up with the moon and the earth, as during a new moon or full moon, the tidal effect is increased. these are known as spring tides, named not for the season, but for the fact that the water "springs" higher than normal. on the other hand, if the sun and the moon are 90 degrees apart in relation to an observer on earth as during the first quarter moon or third quarter moon, then high tides are not as high as they normally would be. this is because despite its greater distance, the sun's mass allows it to exert enough gravitational force on the oceans that it can negate some of the effects of the moon's pull. this phenomenon of lower high tides is called a neap tide. if you need more information on this topic visit moonconnection.com.

i believe the answer is true.