A solution which contains only one of the following anions: OH, SO_4^2-, or CO_3
ID: 1072889 • Letter: A
Question
A solution which contains only one of the following anions: OH, SO_4^2-, or CO_3^2- is tested with various reagents and the following results are obtained: 0.2M AgNO_2 precipitate 0.2M Fe(NO_3)_2 precipitate 0.2M Sr(NO_3)_2 no precipitate Which anion does the solution contain? _ A solution which contains only one of the following cations: Mg^2+, Pb^2+, or NH_4^+ is tested with various reagents and the following results are obtained: 0.2M Na_2 SO_4 precipitate 0.2M Na_2 S precipitate 0.2M NaNO_3 no precipitate Which cation does the solution contain? _ Which is most soluble m water at 25 degree C, lead (II) bromide, lead (II) chloride, lead (II) iodide, or lead (II) iodate? Ksp lead bromide 6.6E-6 Ksp lead chloride = 1.6E-5 Ksp lead iodide = 6.5E-9 Ksp lead iodate = 3.691-13Explanation / Answer
8 .Which is MOST soluble in water at 25 °C, lead (II) bromide, lead (II) chloride, lead (II) iodide, or lead (II) iodate?
solubility products for each of the compounds
Lead bromide is 6.60×10-6
Lead chloride is 1.70×10-5
Lead iodide is 9.8×10-9
Lead iodate is 3.69×10-13
answer :
Lead chloride is 1.70×10-5 has the largest solubility product so is the most soluble
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A solution which contains only one of the following cations Mg2+ ,pb2+, or NH4 + is tested with various
Reagent Results 0.2M
Na2SO4 precipitate 0.2M
Na2S precipitate 0.2M
NaNO3 no precipitate
Which cation does the solution contain? ____
Answer = Pb 2+
0.2M Na2SO4 precipitate This excludes NH4{+} since its sulfate is soluble.
0.2M Na2S precipitate This excludes Mg{2+} since its sufide decomposes in water.
That leaves Pb{2+}.
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A solution which contains only one of the following anions: OH- , SO4 2-, or CO3 2- is tested with various reagents and the following results are obtained:
Reagent Results
0.2M AgNO3 precipitate
0.2M Fe(NO3)2 precipitate
0.2M Sr(NO3)2 no precipitate
Which anion does the solution contain?
Answer = OH-
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