Write one reaction for each of the following
characteristic:
(a) change of state
(b) change of smell
(c) Formation of Percipitate.
Answers
Explanation:
Change of state
when magnesium ribbon burns in air powder of magnesium oxide is formed
2Mg+O2 gives 2Mgo
Formation of precipitate
when potassium iodide solution is added to a solution of Lead Nitrate a yellow precipitate of Lead Nitrate and iodide is formed
Explanation:
a) chemical reactions differ from physical changes, which include changes of state, such as ice melting to water and water evaporating to vapor.
b)The chemical change that occurs when an egg is rotting produces the smell of sulfur. If you go outdoors after a thunderstorm, you may detect an unusual odor in the air.
c)If silver nitrate solution is poured into a solution of sodium chloride, a chemical reaction occurs forming a white precipitate of silver chloride. When potassium iodide solution reacts with lead(II) nitrate solution, a yellow precipitate of lead(II) iodide is formed.