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Dibasic calcium phosphate (CaHPO4) has limited solubility in water with solubility product of Ksp= 7.23*10^-7. Taking into account ionic interactions, what will be the concentration of Ca2+ ions in the solution saturated with CaHPO4 after 2.5*10^-3 m magnesium chloride (MgCl2) is dissolved in the same solution.

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Lelia Lubowitz
Lelia LubowitzLv2
17 Dec 2019

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Related questions

A chemist was to determine Ksp for calcium hydrogen phosphate (CaHPO4). He prepared a saturated solution of CaHPO4 . The equilibrium established is: CaHPO4 (s) <----> Ca 2+ (aq) + HPO4 2- (aq)

A 100.0 mL sample of the solution was titrated with 6.74 x 10^-4 M NaOH. It required 46.91 mL of the NaOH solution to reach the equivalence point in the tiration.

i) Write the balanced net ionic equation for the reaction between solutions of NaOH and CaHPO4 (include phase labels). *I had trouble finding a correct equation online*

B) A chemist then prepared a 0.050 M solution of calcium chloride. The calcium chloride solution was then saturated with calcium hydrogen phosphate. He took a 100.0 mL sample of resulting solution and titrated it with the same 6.47 x 10^-4 M NaOH solution.

i) Do you expect a chemist to use more or less of the NaOH solution to reach the equivalence point for this second titration? Explain your reasoning. this was the only problem i got wrong on the exam - appreciate the help

Will rate the best explained submission

Consider a saturated solution of calcium fluoride in 0.092 M potassium nitrate. Complete the following tasks, and then answer the question.a) Write the chemical equation corresponding to Ksp.b) Write the defining expression for the thermodynamic solubility product constant, Kspo.c) Write the defining expression for the conditional solubility product constant, Ksp'.d) For the Ca2+ and F- ions, write the mathematical relations defining activity of each ion in terms of its concentration and activity coefficient.e) Based on your answers above, derive a relationship for Ksp' in terms of Kspo and activity coefficients, and calculate the value of Ksp', given that Kspo = 3.9 x 10-11. (Note: Compute the activity coefficient for each ion using the Debye-Huckel equation. You can disregard the contribution of the dissolved CaF2 to the overall ionic strength. Also disregard the formation of any HF in the equilibrium solution.) Question:Calculate the molar solubility of the calcium fluoride.

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