Ch.15 - Acid and Base EquilibriumWorksheetSee all chapters
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Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: According to the Bronsted-Lowry definition, which chemical in the following reaction is the base?H3PO4 + NH3 → NH4+ + H2PO4-a. NH3b. NH4+c. H2PO4-d. H3PO4e. None of the above 

Solution: According to the Bronsted-Lowry definition, which chemical in the following reaction is the base?H3PO4 + NH3 → NH4+ + H2PO4-a. NH3b. NH4+c. H2PO4-d. H3PO4e. None of the above 

Problem

According to the Bronsted-Lowry definition, which chemical in the following reaction is the base?
H3PO4 + NH3 → NH4+ + H2PO4-

a. NH3
b. NH4+
c. H2PO4-
d. H3PO4
e. None of the above

 

Solution

We’re being asked to find the Bronsted-Lowry Base in the given reaction. 


Let’s define a Bronsted-Lowry Acid and a Bronsted-Lowry Base. Recall also that Bronsted-Lowry acids and bases occurs in pairs called conjugate acid/base pairs.

Bronsted-Lowry acid → proton (H+) donor

Conjugate base → one less hydrogen form of the Bronsted-Lowry acid

Bronsted-Lowry base → proton (H+) acceptor

Conjugate acid → one hydrogen greater than Bronsted-Lowry base


Given Reaction:      H3PO4 + NH3 → NH4+ + H2PO4- 

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