In the reaction Na2SO4(aq) + BaCl2(aq) → BaSO4(*) + 2NaCl(aq), what will be the actual physical state that can replace (*)?
(s)
This is a double displacement reaction between sodium sulphate and barium chloride in aqueous solution.
The ions exchange partners, and barium sulphate (BaSO4) is formed. Barium sulphate is highly insoluble in water and separates out as a white precipitate.
Since a precipitate is an insoluble solid that settles out of the solution, its physical state is solid, denoted by (s).
The sodium chloride formed stays dissolved and remains aqueous (aq).
Hence, the state that replaces (*) is solid, written as (s).
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Important Questions from Chemical Reaction
- Which one of the following is not an example of a redox reaction?
- Which one of the following is not a pigment?
- Which one of the following reactions is an example of decomposition reaction?
Match List I with List II and select the correct answer using the code given below the Lists:
LIST I
(Chemical process)
LIST II
(Reaction)
A.
Electrolysis of water
1.
Double displacement
reactionB.
Burning of coal
2.
Combination reaction
C.
Iron nail immersed in copper sulphate solution
3.
Decomposition reaction
D.
Addition of barium chloride solution to aluminium sulphate solution
4.
Displacement reaction
Consider the following reaction:
Fe2O3(s) + 2Al(s) → 2Fe(s) + Al2O3(s)
Which of the following statements about the given reaction is NOT correct?
