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1 Answer
Ernest Z.
May 25, 2018

The maximum concentration of #"Ca"^"2+"# is #2.3 × 10^"-3" color(white)(l)"mol/L"#.

Explanation:

#color(white)(mmmmmml)"CaSO"_4 → "Ca"^"2+" + "SO"_4^"2-"#
#"I/mol·L"^"-1": color(white)(mmmmmmm)0color(white)(mmmll)0#
#"C/mol·L"^"-1": color(white)(mmmmmm)"+"scolor(white)(mmm)"+"s#
#"E/mol·L"^"-1": color(white)(mmmmmmll)scolor(white)(mmmll)s#

#K_text(sp) = ["Ca"^"2+"]["SO"_4^"2-"] = s^2 = 5.2 ×10^"-6"#

#s = sqrt(5.2 ×10^"-6") = 2.3 × 10^"-3"#

#["Ca"^"2+"] = s color(white)(l)"mol/L" = 2.3 × 10^"-3" color(white)(l)"mol/L"#

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