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Tooth enamel is composed of hydroxyapatite, whose simplest formula is Ca5(PO4)3OH, and whose corresponding Ksp = 6.8 X 10-27. As discussed in the "Chemistry and Life" box on page 730, fluoride in fluorinated water or in toothpaste reacts with hydroxyapatite to form fluoroapatite, Ca5(PO4)3F,whose Ksp = 1.0 X 10-60 .
(a)Write the expression for the solubility-constant for hydroxyapatite and for fluoroapatite .
(b) Calculate the molar solubility of each of these compounds.
A sample container of carbon monoxide occupies a volume of 435 mL at a pressure of 785 torr and a temperature of 298 K. What would its temperature be if the volume were changed to 265 mL at a pressure of 785 torr? A. 182 K B. 298 K C. 387 K D. 489..
What can you conclude when no precipitate forms when HCL is added to an unknown solution
Indicate the pH at (a) the beginning of the titration (0.0 mL titrant) and after the addition of (b) 12.5 mL, (c) 24.0 mL, (d) 24.9 mL, (e) 25.0 mL, (f) 25.1 mL, and (g) 30.0 mL of the titrant. Label the half-neutralization point and the equivalen..
A sample of 0.836 gm of unknown compound containing barium ions Ba2+ is dissolved in water and treated with an excess of Na2So4. If the mass of BaSo4 precipitat formed 0.7403 gm, what is the percent by mass of Ba in the orginal unknown compund
explain the main concept behind the vsepr theory of molecular shape. how do both number and type of electron pairs
Calculate the volume (in dL\rm dL) of a piece of iron having a mass of 4.64kg\rm kg. Note that the density is provided in different units of volume and mass than the desired units of volume (dL\rm dL) and the given units of mass (kg\rm kg).
The molarity of SO42- in a saturated solution of SrSO4 was determined to be 0.000500 M. Calculate the solubility product constant (Ksp) for SrSO4. SrSO4 (s) Sr2+ (aq) + SO42- (aq) Molar Mass (g/mol) SrSO4 183.68
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide gas and liquid water, it releases 3919kJ of heat per mole of cyclohexane burned.
ethanec2h6burns in oxygena. what are the products of the reaction?c. what mass of o2in grams is required for complete
Explain what is more soluble, a solution of free histidine or a solution of histidine tetrapeptide at pH 6 net charge +2
Problem- Below are the data on decomposition of hydrogen peroxide in the presence of 0.3 micrograms/liter of catalase. From these data, estimate the turnover number for the enzyme. Molecular weight of catalase is 55,000.
A 400ml sample of gas at 10 degrees celsius is warmed to 25 degrees celcius at a constant pressure. Calculate the final volume.
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