Question

Sodium chloride is added to water and stirred. A salt solution is obtained and then it is boiled and it leaves behind a residue. a)Name the change b)Name the residue
c)Are the composition and properties of the substance altered?
d)Give reason why this experiment is not possible with calcium carbonate?

Answer 1

Answer:

Explanation:

which ch n class?

Answer 2

Answer:

a) Physical change

b) salt

c)no

d) Because chemical changes take place