Which of the following is an acid base reaction?
C(s) + O2(g) → CO2(g)
MgSO4(aq) + Ba(NO3)2(aq) → Mg(NO3)2(aq) + BaSO4(s)
2 HClO4(aq) + Ca(OH)2(aq) → 2 H2O(l) + Ca(ClO4)2(aq)
Fe(s) + 2 AgNO3(aq) → 2 Ag(s) + Fe(NO3)2(aq)
None of the above are acid base reactions.
2 HClO4(aq) + Ca(OH)2(aq) → 2 H2O(l) + Ca(ClO4)2(aq)
2 HClO4(aq) + Ca(OH)2(aq) → 2 H2O(l) + Ca(ClO4)2(aq)
Doesn't that depend upon how you define an acid and a base?
The correct answer is:
2 HClO4(aq) + Ca(OH)2(aq) → 2 H2O(l) + Ca(ClO4)2(aq)
This is an acid-base reaction because the acid, HClO4, reacts with the base, Ca(OH)2, to form water and a salt, Ca(ClO4)2.
But let's not forget about the other reactions! They also deserve some attention, even if they're not acid-base reactions. After all, every reaction deserves a little love and recognition.
The reaction that is an acid-base reaction is: 2 HClO4(aq) + Ca(OH)2(aq) → 2 H2O(l) + Ca(ClO4)2(aq).
To determine whether a chemical reaction is an acid-base reaction, you need to identify the presence of an acid and a base in the reactants and observe the formation of water and a salt in the products.
In the given equation, HClO4 is an acid and Ca(OH)2 is a base. When they react, water (H2O) and a salt, Ca(ClO4)2, are formed. This formation of water and a salt indicates that it is an acid-base reaction.
Therefore, the correct answer is: 2 HClO4(aq) + Ca(OH)2(aq) → 2 H2O(l) + Ca(ClO4)2(aq).