^^Using Table 38.3 in the Voyce text, calculate the solubility of Manganese(II)
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Question
^^Using Table 38.3 in the Voyce text, calculate the solubility of Manganese(II) hydroxide at 25oC
A. 3.6 x 10-5 B. 5.7 x 10-5 C. 4.4 x 10-7 Table 38.3 SOLUBILITY-PRODUCT CONSTA CT CONSTANTS FOR COMPOUNDS AT 25° c Name Formula 5.1 x 10-9 1.0 x 10-6 5 X 10-3 3.4 X 10-23 1.1 X 10-10 5.2 X 10-12 2.5 X 10-14 2.8 X 10-9 3.9 X 10-11 5.5 X 10-6 2.0 10-29 9.1 X 10-6 6.6 x 10-11 6.3 X 10-31 1.4 x 10-10 2.2 x 10-20 1.3 X 10-37 6.3 X 10-36 3.2 X 10-11 8.0 X 10-16 6.3 x 10-18 4 X 10-38 6.1 x 10-12 7.4 x 10-14 Barium carbonate Barium fluoride Barium hydroxide Barium phosphate Ba3(P04)2 Barium sulfate Cadmium carbonate Cadmium hydroxide Calcium carbonate Calcium fluoride Calcium hydroxide Calcium phosphate CdC03 Cd (0H)2 Ca ( Calcium sulfate Chromium(III) fluoride Chromium(III) hydroxide Copper(II) carbonate Copper (II) hydroxide Copper(II) phosphate Copper(II) sulfide Iron(II) carbonate Iron (II) hydroxide Cu (0H) 2 Cu3(PO4)2 Fe (0H)2 Iron (II) sulfide Iron (II) hydroxide Lanthanum iodate Lead carbonate Lead chloride Lead fluoride PbCO3 PbC 2.7 X 10-8 1.2 x 10-15 1.6 X 10 1.6 X 10 sLead hydroxide Pb (0H) 2 PbS04 PbS Mg(0H)2 MnC03 Lead sulfate Lead sulfide 8 8 Magnesium hydroxide Manganese carbonate Manganese hydroxide Manganese(II) sulfide 1.8 x 10-11 1.8 x 10 1.9 10-13 1.0 10-13 6.6 X 10-9 1.6 x 10-14 5.0 x 10-13 Nickel carbonate Nickel hydroxide Silver bromide Silver carbonate Silver chloride Silver chromate Silver cyanide Silver iodide Silver sulfate Strontium carbonate NiC03 AgBr 8.1 x 10-12 1.8 x 10-10 1.1 x 10-12 1.2 x 10-16 8.3 x 10-17 1.4 X 10 1.1 x 10-10 1.4 x 10-28 5 Tin(II) hydroxide Zinc hydroxide Zn(0H)2 1.2 x 10-17Explanation / Answer
Ksp of Mn(OH)2 = 1.9 x 10^-13
Mn(OH)2 <---------------------> Mn+2 + 2OH-
S 2S
Ksp = [Mn+2] [OH-]^2
Ksp = (S) (2S)^2
Ksp = 4 S^3
1.9 x 10^-13 = 4 S^3
S =3.6 x 10^-5 M
solubility = S = 3.6 x 10^-5 M
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