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Experiment 17 Observations and Report Sheet: Development of a Scheme for Qualitative Analysis Table of Solubility Properties


Observations and conclusions on known mixture: Observations and conclusions on unknown mixtures!
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Answer #1

Na2SO4

i) Na2SO4 + Ba2+(aq) ----> BaSO4(s) + 2Na+(aq)

Note: The formation of precipitate occurs.

ii) Na2SO4 + Mg2+(aq) ----> MgSO4(aq) + 2Na+(aq)

Note: The precipitation doesn't occur.

iii) 3Na2SO4 + 2Al3+(aq) ----> Al2(SO4)3(aq) + 6Na+(aq)

Note: The precipitation doesn't occur.

Na2CO3

i) Na2CO3 + Ba2+(aq) ----> BaCO3(s) + 2Na+(aq)

Note: The formation of precipitate occurs.

ii) Na2CO3 + Mg2+(aq) ----> MgCO3(s) + 2Na+(aq)

Note: The formation of precipitate occurs.

iii) 3Na2CO3 + 2Al3+(aq) ----> Al2(CO3)3(s) + 6Na+(aq)

Note: The formation of precipitate occurs.

NaOH

i) 2NaOH + Ba2+(aq) ----> Ba(OH)2(aq) + 2Na+(aq)

Note: Precipitation doesn't occur.

ii) 2NaOH + Mg2+(aq) ----> Mg(OH)2(aq) + 2Na+(aq)

Note: Precipitation doesn't occur.

iii) 6NaOH + 2Al3+(aq) ----> 2Al(OH)3(s) + 6Na+(aq)

Note: The formation of precipitate occurs.

NH4OH

i) 2NH4OH + Ba2+(aq) ----> Ba(OH)2(aq) + 2NH4+(aq)

Note: Precipitation doesn't occur.

ii) 2NH4OH + Mg2+(aq) ----> Mg(OH)2(aq) + 2NH4+(aq)

Note: Precipitation doesn't occur.

iii) 6NH4OH + 2Al3+(aq) ----> 2Al(OH)3(s) + 6NH4+(aq)

Note: The formation of precipitate occurs.

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