What is the K_sp of hydroxyapatite, i.e. tooth enamel? Cite sources (verify with

Question

What is the K_sp of hydroxyapatite, i.e. tooth enamel? Cite sources (verify with 2 sources) Considering the size of K_sp, are reactants or products favored? Does the answer make sense considering the purpose of the enamel on teeth? Why? What is molar solubility of hydroxyapatite? What effect would add sourced from soda or fruit juice have upon this equilibrium of this sparingly soluble salt? What is the effect on both enamel? Research the effect of fluoride on enamel and its effect on K_sp. Use this information to determine chemically if fluoride treatments are beneficial in preventing erosion of toot enamel and therefore tooth decay. Why?

Explanation / Answer

1. the ksp value for hydroxyhapatite which is main constituent in toothe anamel is ksp= 6.8*10-37.

2.ksp determines the solubility of compound at saturation, actually eanmel is isoluble in water it will be soluble in acid. higher the ksp value ( less netive power), easier for the mineral to dissolve.

3.ksp= [5x]5[3x]3[x]

6.8*10-37= 84375*X9

X= 2.55*10-20 is the molar solubility of hydroxy heapatite

4. from the ionic activity product , we can say that when acid is added to equilibrium, tooth enamel start dissolve in.

5.when fluorine replaces the OH from hepatite, the ksp value will be decreses ( higher -ve power) and less soluble in mineral.

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