Multiple Choice
Which of the following is the correct chemical formula for aluminum hydroxide?
3. Chemical Reactions
Naming Ionic Compounds
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Which of the following compounds is classified as a salt?
A
NaCl
B
CO_2
C
H_2O
D
HCl
Verified step by step guidance1
Understand the definition of a salt in chemistry: a salt is an ionic compound formed from the neutralization reaction between an acid and a base, typically consisting of a metal cation and a nonmetal anion.
Analyze each compound given: CO_2 (carbon dioxide) is a molecular compound, not ionic; H_2O (water) is a molecular compound and a neutral molecule; HCl (hydrogen chloride) is a molecular compound that can act as an acid when dissolved in water.
Look at NaCl (sodium chloride): it consists of Na^+ (a metal cation) and Cl^- (a nonmetal anion), which are held together by ionic bonds, fitting the definition of a salt.
Confirm that NaCl is formed from the neutralization of HCl (acid) and NaOH (base), which is a classic example of salt formation.
Conclude that among the options, NaCl is classified as a salt because it is an ionic compound formed from an acid-base reaction.
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