[wizrak]

Hi, I have been continually trying to solve a question:

There are 5 unlabelled bottles in a labortory. Each are 0.1mol L^-1 in solutions

Barium nitrate, hydrocholric acid, sodium carbonate, sodium hydroxide, copper nitrate

By inspection and then by mixing combinations of the solutions it is possible to determine the solution in each bottle

Outline how this could be done in a small number of steps.
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I understand that copper nitrate solution would be pale blue, and colourless gas evolved with sodium carbonate.
However, I do not understand which combination of these solutions will give insoluble precipitates e.g. barium carbonate (insoluble white ppt)
Thus I want to ask wheter there is a special trend for solubilities of precipitates e.g. Group 1 precipitates tend to be very soluble in water or going down the group causes it to be less soluble as enthalpy change of solution becomes more endothermic.
*especially which anion containing salts are more soluble e.g. sulfides are not very soluble

[Borek]

Google solubility rules.

[maivu]

Hi, I have been continually trying to solve a question:

There are 5 unlabelled bottles in a labortory. Each are 0.1mol L^-1 in solutions

Barium nitrate, hydrocholric acid, sodium carbonate, sodium hydroxide, copper nitrate

By inspection and then by mixing combinations of the solutions it is possible to determine the solution in each bottle

Outline how this could be done in a small number of steps.
------------------------------------------------------------------------------------------------------------------------------------------------
I understand that copper nitrate solution would be pale blue, and colourless gas evolved with sodium carbonate.
However, I do not understand which combination of these solutions will give insoluble precipitates e.g. barium carbonate (insoluble white ppt)
Thus I want to ask wheter there is a special trend for solubilities of precipitates e.g. Group 1 precipitates tend to be very soluble in water or going down the group causes it to be less soluble as enthalpy change of solution becomes more endothermic.
*especially which anion containing salts are more soluble e.g. sulfides are not very soluble

which combination of these solutions will give insoluble precipitates e.g. barium carbonate

Barium carbonate, copper hydroxide, barium sulfate are precipitates (ppt.).

To solve this question, you should draw a table an to record reaction between each one of the solution.

Cu(NO₃)₂ is pale blue solution.
BaNO₃: only white ppt. BaSO₄ and BaCO₃
H₂SO₄: white ppt of BaSO₄ and CO₂ gas.
Na₂CO₃: white ppt of BaCO₃; gas; blue ppt of Cu(OH)₂.
NaOH: only form blue ppt.

[Borek]

This is an old thread, so in this particular case it doesn't matter much - but you are on the verge of solving the question for someone. That's against forum rules.