Question

Giving an example list two information which make a chemical equation more useful or informative

Answer 1

Answer:

Hope this helps...

Explanation:

To make chemical equations more informative we mention :-

>The state of the reactant and product it is either solid liquid or gas

g for gases

s for solids

l for liquids

aq for aquoas solution.

>If gas we use up arrow sign

and if precipitate we use down arrow sign.

example:-

H2(g)+O2(g) ------> 2H2O(l)

Answer 2

Answer:

(i) Physical state of reactants must be mentioned, e.g.

2H2 (g) + O2 (g)——– > 2H20 (l)

(ii) Condition in which reaction takes place are written on the arrow head

Consider the following chemical reaction

X + Barium chloride——–> Y + Sodium chloride

(White ppt)

(a) Identify ‘X’ and ‘Y’

(b) The type of reaction

(a) ‘X’ is Na2SO4 and Y is BaSO4.

(b) The type of reaction

Na2SO4 + BaCl2—–> BaSO4 + 2NaCl

(White ppt)

The reaction is precipitation reaction. It is also called double displacement reaction.