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Tooth Enamel Is Composed of the Mineral Hydroxyapatite ×\times 10-59, but It Reacts with Weak Acids in the Mouth

Question 27

Multiple Choice

Tooth enamel is composed of the mineral hydroxyapatite. It is essentially insoluble in water with Ksp = 2.3 ×\times 10-59, but it reacts with weak acids in the mouth as described by one of the reaction equations below. You can determine the equilibrium constant, K, for this reaction from Ksp and Kw (the equilibrium constant for water autoionization, Kw = 1.0 ×\times 10-14) . What is the value of K?
 Tooth enamel is composed of the mineral hydroxyapatite. It is essentially insoluble in water with K<sub>sp</sub> = 2.3  \times  10<sup>-59</sup>, but it reacts with weak acids in the mouth as described by one of the reaction equations below. You can determine the equilibrium constant, K, for this reaction from K<sub>sp</sub> and K<sub>w</sub> (the equilibrium constant for water autoionization, K<sub>w</sub> = 1.0  \times  10<sup>-14</sup>) . What is the value of K?                    A) 2.3  \times  10 <sup>-73</sup> B) 4.3  \times  10 <sup>45</sup> C) 2.3  \times  10 <sup>-45</sup> D) 1.1  \times  10 <sup>-14</sup> E) 9.9  \times  10 <sup>-15</sup>
 Tooth enamel is composed of the mineral hydroxyapatite. It is essentially insoluble in water with K<sub>sp</sub> = 2.3  \times  10<sup>-59</sup>, but it reacts with weak acids in the mouth as described by one of the reaction equations below. You can determine the equilibrium constant, K, for this reaction from K<sub>sp</sub> and K<sub>w</sub> (the equilibrium constant for water autoionization, K<sub>w</sub> = 1.0  \times  10<sup>-14</sup>) . What is the value of K?                    A) 2.3  \times  10 <sup>-73</sup> B) 4.3  \times  10 <sup>45</sup> C) 2.3  \times  10 <sup>-45</sup> D) 1.1  \times  10 <sup>-14</sup> E) 9.9  \times  10 <sup>-15</sup>
 Tooth enamel is composed of the mineral hydroxyapatite. It is essentially insoluble in water with K<sub>sp</sub> = 2.3  \times  10<sup>-59</sup>, but it reacts with weak acids in the mouth as described by one of the reaction equations below. You can determine the equilibrium constant, K, for this reaction from K<sub>sp</sub> and K<sub>w</sub> (the equilibrium constant for water autoionization, K<sub>w</sub> = 1.0  \times  10<sup>-14</sup>) . What is the value of K?                    A) 2.3  \times  10 <sup>-73</sup> B) 4.3  \times  10 <sup>45</sup> C) 2.3  \times  10 <sup>-45</sup> D) 1.1  \times  10 <sup>-14</sup> E) 9.9  \times  10 <sup>-15</sup>
 Tooth enamel is composed of the mineral hydroxyapatite. It is essentially insoluble in water with K<sub>sp</sub> = 2.3  \times  10<sup>-59</sup>, but it reacts with weak acids in the mouth as described by one of the reaction equations below. You can determine the equilibrium constant, K, for this reaction from K<sub>sp</sub> and K<sub>w</sub> (the equilibrium constant for water autoionization, K<sub>w</sub> = 1.0  \times  10<sup>-14</sup>) . What is the value of K?                    A) 2.3  \times  10 <sup>-73</sup> B) 4.3  \times  10 <sup>45</sup> C) 2.3  \times  10 <sup>-45</sup> D) 1.1  \times  10 <sup>-14</sup> E) 9.9  \times  10 <sup>-15</sup>
 Tooth enamel is composed of the mineral hydroxyapatite. It is essentially insoluble in water with K<sub>sp</sub> = 2.3  \times  10<sup>-59</sup>, but it reacts with weak acids in the mouth as described by one of the reaction equations below. You can determine the equilibrium constant, K, for this reaction from K<sub>sp</sub> and K<sub>w</sub> (the equilibrium constant for water autoionization, K<sub>w</sub> = 1.0  \times  10<sup>-14</sup>) . What is the value of K?                    A) 2.3  \times  10 <sup>-73</sup> B) 4.3  \times  10 <sup>45</sup> C) 2.3  \times  10 <sup>-45</sup> D) 1.1  \times  10 <sup>-14</sup> E) 9.9  \times  10 <sup>-15</sup>
 Tooth enamel is composed of the mineral hydroxyapatite. It is essentially insoluble in water with K<sub>sp</sub> = 2.3  \times  10<sup>-59</sup>, but it reacts with weak acids in the mouth as described by one of the reaction equations below. You can determine the equilibrium constant, K, for this reaction from K<sub>sp</sub> and K<sub>w</sub> (the equilibrium constant for water autoionization, K<sub>w</sub> = 1.0  \times  10<sup>-14</sup>) . What is the value of K?                    A) 2.3  \times  10 <sup>-73</sup> B) 4.3  \times  10 <sup>45</sup> C) 2.3  \times  10 <sup>-45</sup> D) 1.1  \times  10 <sup>-14</sup> E) 9.9  \times  10 <sup>-15</sup>


A) 2.3 ×\times 10 -73
B) 4.3 ×\times 10 45
C) 2.3 ×\times 10 -45
D) 1.1 ×\times 10 -14
E) 9.9 ×\times 10 -15

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