Question

write the chemical equations in which the following changes have to taken place with the example of each:

i)formation of precipitate

ii)change in state

iii)evolution of gas​

Answer 1

Explanation:

Here's the solution. Hope it will help you.

Answer 2

Answer:

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Explanation:

i)◆formation of precipitate

–-------------------------------------

Ca(OH)2(aq)+CO2---------;-)CaCO3(s)【precipitate】+H2O(I)

ii)3Fe(s)+4H2O(g)-------->Fe3O4(s)+4H2(g)

iii) carbonic acid breaks down to water and carbon dioxide

    or 2FeSO4(S)+--HEAT---------->Fe2SO4(S)+S02(G)+SO3(G)