What type of ions exchange between reactants in a double displacement reaction?
Positive - negative ions
In a double displacement reaction, two compounds in solution swap their ions to form two new compounds, so a positive ion (cation) of one reactant pairs with a negative ion (anion) of the other.
For example, in AgNO3 + NaCl → AgCl + NaNO3, Ag+ joins Cl- and Na+ joins NO3-, i.e. positive and negative ions are exchanged.
Exchange of positive-positive or negative-negative ions is not possible, because two like-charged ions cannot bond to form a stable neutral compound.
Hence, the ions exchanged are positive - negative ions.
Similar Questions
If a piece of aluminium is added to iron(II) sulphate (FeSO4) solution, what will happen?
Balance the following reaction:
\(3\,\text{MnO}_2\,(s) + x\,\text{Al}\,(s) \rightarrow 3\,\text{Mn}\,(l) + y\,\text{Al}_2\text{O}_3\,(s) + \text{Heat}\)
What is the primary chemistry behind a displacement reaction?
What is the primary purpose of anodising aluminium?
What is generally produced when a metal reacts with an acid?
Which of the following is a chemical change?
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?
