Answered: Bacteria in the human mouth release…

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter18: Representative Metals, Metalloids, And Nonmetals

Section: Chapter Questions

Problem 52E: The reaction of calcium hydride, CaH2, with water can be characterized as a Lewis acid-base...

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Question

Bacteria in the human mouth release enzymes to break up sucrose, and then
polymerize glucose to form a bacterial plaque. When this glucose is digested, it forms
lactic acid, which causes tooth decay. Tooth enamel is made of calcium phosphate.
Lactic acid has a Ka 1.38x10 -4 and ionizes into lactate and H3O+ ions. Assuming an
initial lactic acid concentration of 0.10 mol/L on your tooth, determine the pH
(assume a 1:1:1 mole ratio) and the percent ionization. Should people be concerned
with plaque buildup? Justify your answer.

Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

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