As a result of mineral erosion and biological activity, phosphate ion (PO,3-) is common in natural waters, where it often precipitates as insoluble salts such as Ca3(PO4)2. A researcher takes 25 mL of water from river #1, which has a [Ca²*] of 0.3 M, and adds it to 50 mL of water from river #2. Assume river #1 contains no phosphate and that river #2 contains no calcium. What is the minimum [PO,3-] in river #2 for Ca (PO,)21e precipitate (K. = 2.6 x 10-9) to form in the mixed volume?

Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter21: The Chemistry Of The Main Group Elements
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As a result of mineral erosion and biological activity, phosphate ion (PO,3-) is common in natural waters,
where it often precipitates as insoluble salts such as Ca3(PO4)2. A researcher takes 25 ml of water from
river #1, which has a [Ca2+] of 0.3 M, and adds it to 50 mL of water from river #2. Assume river #1
contains no phosphate and that river #2 contains no calcium. What is the minimum [PO,3] in river #2 for
Ca3(PO4)2(9) precipitate (Kgp = 2.6 x 10º) to form in the mixed volume?
Transcribed Image Text:As a result of mineral erosion and biological activity, phosphate ion (PO,3-) is common in natural waters, where it often precipitates as insoluble salts such as Ca3(PO4)2. A researcher takes 25 ml of water from river #1, which has a [Ca2+] of 0.3 M, and adds it to 50 mL of water from river #2. Assume river #1 contains no phosphate and that river #2 contains no calcium. What is the minimum [PO,3] in river #2 for Ca3(PO4)2(9) precipitate (Kgp = 2.6 x 10º) to form in the mixed volume?
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