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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

(a) Write a balanced equation for the reaction that occurs when H3PO4, phosphoric acid, donates a proton to water to form the dihydrogen phosphate ion.

(b) Write a net ionic equation showing the dihydrogen phosphate ion acting as a Bronsted acid in a reaction with water. Write another net ionic equation showing the dihydrogen phosphate ion acting as a Brønsted base in a reaction with water. What term is used to describe a species such as the dihydrogen phosphate ion that can act both as an acid or as a base?

(a)

Interpretation Introduction

Interpretation:

The balanced equation for formation of dihydrogen phosphate from Phosphoric acid in water should be explained.

Concept Introduction:

The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, therefore, the number of atoms present in the reactants is equal to the number of atoms present in the products.

Bronsted Acid: An acid donates (loses)H+ ion.

Bronsted Base: A base accepts (gains)H+ ion.

Explanation

  

Phosphoric acid is a triprotic acid (it contains three ionizable hydrogens).  Phosphoric acid gives the H+ ion to water molecule and forms the hydronium ion (H3O+)</

(b)

Interpretation Introduction

Interpretation:

The net ionic equation for the ionization of dihydrogen phosphate in water and the nature of the dihydrogen phosphate should be explained.

Concept Introduction:

The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, therefore, the number of atoms present in the reactants is equal to the number of atoms present in the products.

Bronsted acid: An acid donates (loses) H+ ion.

Bronsted Base: A base accepts (gains) H+ ion.

Amphiprotic substance: An amphiprotic substance is a substance that can donate or accept a proton.

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