Question

When an ionic compound dissolves in water, the compound is separated into individual _________(1). When one element substitutes another element in a compound, the reaction is known as a ____________(2) reaction. When the interchange of two ions in a reaction produces a solid compound or a molecular compound, the reaction is known as a ____________(3) reaction.

• A. (1) atoms (2) exothermic (3) displacement
• B. (1) molecules (2) decomposition (3) double displacement
• C. (1) ions (2) displacement (3) double displacement
• D. (1) atoms (2) endothermic (3) displacement

Answer 1

Answer: (C)

(1) ions (2) displacement (3) double displacement

When an ionic compound dissolves in water, the compound is separated into individual ions as:

$NaCl\to N{a}^{+}+C{l}^{-}$

A single displacement reaction is a common and important type of chemical reaction. A single displacement reaction is characterized by one element being displaced from a compound by another element.

$A+BC\to AC+B$

Double Displacement Reaction: A double displacement reaction is a type of reaction where part of one reactant is replaced by part of another reactant.
Double displacement reactions take the form:

$AB+CD\to AD+CB$