Chemistry help!! In lab we performed this experiment and we focused on the relat
ID: 1064058 • Letter: C
Question
Chemistry help!!
In lab we performed this experiment and we focused on the relative solubilities of select alkaline earth compounds. We began by mixing nitrate solutions of barium, calcium, magnesium, and strontium with solutions obtaining the sulfate (SO4 2-), carbonate (CO3 2-), oxalate (C2O4 2-), and iodate (IO3 -) polyatomic anions.I need help with this: Use your observations to determine the combination of alkaline earth cations and test solution anions that produce a precipitate. Predict the chemical formulas of the observed precipitates. Use your observations to identify any periodically recurring trends in the relative solubilities of the Group 2 sulfates, carbonates, oxalates, and iodates. The observed trends in solubility should vary somewhat smoothly among the alkaline earth elements. That is, they should either increase or decrease gradually through this group. By observing these trends in solubility you should be able to confirm the ordering of these elements in the periodic table.
Part 1: Relative Solubilities of Select Alkaline Earth Compounds
H2SO4
Na2CO3
(NH4)C2O4
KIO3
Ba (NO3)2)
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BaSO4
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BaCO3
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Ba2C2O4
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Ba(IO)3
Ca (NO3)2
No reaction
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CaCO3
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CaC2O4
No reaction
Mg (NO3)2
No reaction
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MgCO3
No reaction
No reaction
Sr(NO3)2
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SrSO4
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SrCO3
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SrC2O4
No reaction
H2SO4
Na2CO3
(NH4)C2O4
KIO3
Ba (NO3)2)
White ppt
BaSO4
White ppt
BaCO3
White ppt
Ba2C2O4
White ppt
Ba(IO)3
Ca (NO3)2
No reaction
White ppt
CaCO3
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CaC2O4
No reaction
Mg (NO3)2
No reaction
White ppt
MgCO3
No reaction
No reaction
Sr(NO3)2
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SrSO4
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SrCO3
White ppt
SrC2O4
No reaction
Explanation / Answer
in a gropu top to bottom solubility with H2SO4 is decreases.
in a gropu top to bottom solubility with Na2CO3 is decreases.
in a gropu top to bottom solubility with (NH4)C2O4 is decreases
in a gropu top to bottom solubility with KIO3 is decreases
In a IIA group solubility is decreases from top to bottom.
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