Question

What are the products of this reaction: Calcium chloride (aq) + Sodium Hydroxide (aq)?

Answer 1

Hint: We know that when calcium chloride ($CaC{{l}_{2}}$) reacts with sodium hydroxide (NaOH), double displacement reaction takes place and a forms a white precipitate in the solution. Double displacement reaction is the chemical reaction in which one component of each of both the reacting molecules is exchanged to yield the products.

Complete answer:
Let us first discuss the double displacement reaction followed by the reaction between calcium chloride ($CaC{{l}_{2}}$) and sodium hydroxide (NaOH).
-Double displacement reaction: It may be described as the chemical reactions in which one component of each of both the reacting molecules is exchanged to yield the products. In this reaction, the cations and anions of two different compounds switch their places resulting in the formation of two entirely different compounds.
-Reaction between calcium chloride ($CaC{{l}_{2}}$) and sodium hydroxide (NaOH):-
Both calcium chloride and sodium hydroxide are soluble in water which means that they exist as ions in aqueous solution.
When aqueous solutions of calcium chloride and sodium hydroxide are mixed together, the calcium cations will combine with the hydroxide anions and form calcium hydroxide ($Ca{{(OH)}_{2}}$). Calcium hydroxide is an insoluble white solid that precipitates out of solution.
-The other product is aqueous sodium chloride (NaCl) which is an ionic compound formed by the sodium and chloride ions. It is a soluble colourless compound.
The reaction is shown below:-
$CaC{{l}_{2}}(aq)+NaOH(aq)\to Ca{{(OH)}_{2}}(s)+NaCl(aq)$.
-Hence the products of reaction between calcium chloride ($CaC{{l}_{2}}$) and sodium hydroxide (NaOH) are calcium hydroxide ($Ca{{(OH)}_{2}}$) and sodium chloride (NaCl).

Note:
-Remember that double displacement reactions can be further categorized as neutralization, precipitation and gas formation reactions based on the product formation. Since here we obtain a white precipitate, therefore it is a precipitation reaction as well.