The mineral tri-magnesium phosphate (Mg3(PO4)2, denoted TMP) is widely used in the pharmaceutical and food industries. A pharmaceutical company needs to prepare TMP in their labs. They mix 0.5 liter MgCl2 solution (0.2 M) with 0.5 liter of 0.1 M K2HPO4 solution. In order to precipitate TMP in the required amount, the pH is controlled by either acid or base dosages. a. Write a parametric equation to calculate the minimum pH value required for TMP precipitation in the mixture. In other words, write an equation for calculating the pH for tri-magnesium phosphate PP = 0. Substitute in the equation all the known values, in order to have the pH as the only unknown. b. What is the acidity of the mixture, assuming that no precipitation took place? Define exactly which acidity you are referring to, and mention whether it is possible to determine this acidity in the lab. Explain! Write down the steps in a numerical procedure for calculating the PP of TMP?
The mineral tri-magnesium phosphate (Mg3(PO4)2, denoted TMP) is widely used in the pharmaceutical and food industries. A pharmaceutical company needs to prepare TMP in their labs. They mix 0.5 liter MgCl2 solution (0.2 M) with 0.5 liter of 0.1 M K2HPO4 solution. In order to precipitate TMP in the required amount, the pH is controlled by either acid or base dosages. a. Write a parametric equation to calculate the minimum pH value required for TMP precipitation in the mixture. In other words, write an equation for calculating the pH for tri-magnesium phosphate PP = 0. Substitute in the equation all the known values, in order to have the pH as the only unknown. b. What is the acidity of the mixture, assuming that no precipitation took place? Define exactly which acidity you are referring to, and mention whether it is possible to determine this acidity in the lab. Explain! Write down the steps in a numerical procedure for calculating the PP of TMP?
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
Problem 57P
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Transcribed Image Text:The mineral tri-magnesium phosphate (Mg3(PO4)2, denoted TMP) is widely used in the
pharmaceutical and food industries. A pharmaceutical company needs to prepare TMP in their
labs. They mix 0.5 liter MgCl2 solution (0.2 M) with 0.5 liter of 0.1 M K2HPO4 solution. In order to
precipitate TMP in the required amount, the pH is controlled by either acid or base dosages.
a. Write a parametric equation to calculate the minimum pH value required for TMP
precipitation in the mixture. In other words, write an equation for calculating the pH
for tri-magnesium phosphate PP = 0. Substitute in the equation all the known
values, in order to have the pH as the only unknown.
b. What is the acidity of the mixture, assuming that no precipitation took place? Define
exactly which acidity you are referring to, and mention whether it is possible to
determine this acidity in the lab. Explain!
c. Write down the steps in a numerical procedure for calculating the PP of TMP?
Determine exactly how each parameter used in your steps changes in each
numerical step. That is, do not write "recalculate alkalinity", rather write the
equation showing what will be the change in alkalinity.
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