Question

What is the formula and name of the compound produced at the end of the virtual lab, and what caused it to have a different appearance than the tin and nitric acid that you mixed at the beginning of the lab?

Answer 1

Answer:
`SnO_2` ,
`NO_2` and
`H_2O` are formed at the end of the reaction. They are named as tin (IV) oxide or stannic oxide, nitrogen dioxide and water respectively.

Explanation: Reaction of tin and nitric acid is given as:

`Sn(s)+4HNO_3(aq.)\rightarrow SnO_2(s)+4NO_2(g)+2H_2O(l)`

Three products are formed at the end of the reaction which are:

• 
  `SnO_2` which is termed as stannic oxide or Tin (IV) oxide. This is a white colored solid.

• 
  `NO_2` which is termed as nitrogen dioxide. These are brown colored fumes.

• 
  `H_2O` which is termed as water.

At the starting tin was a silvery-white colored solid and after the reaction, it changed the color to milky-white. This change in color is due to the chemical reaction happening between tin and nitric acid.

Release of brown fumes are also an indication that a chemical reaction has taken place.