Precipitation Reaction Flowchart

[AgNO3]

I have to test a solution that may contain any or all of the nitrate salts of Mg²⁺, Sr²⁺, Ca²⁺ and Ba²⁺. Because I cannot use a flame test, I'll have to test the solution by observing the percipitates formed (if any) when H₂SO₄, NaOH, (NH₄)₂C₂O₄ or K₂CrO₄ reacts with the above nitrate salts.

It has been experimentally shown that the nitrate salt of Sr²⁺ forms a precipitate aqueous solutions containing SO₄^2-, C₂O₄^2-, and CrO₄^2- compounds.
The nitrate salt of Mg²⁺ forms a percipitate with only the OH^- compound.
The Nitrate Salt of Ca²⁺ forms a percipitate with OH^- and C₂O₂^2-.
Finally, Ba²⁺ forms precipitates with everything Sr²⁺ reacts with.

Since the Stronium and Barium react with the same compound, something else must be done. I have the following materials:

All the compounds above in Aqueous form.
Acetic Acid
Microcentrifuge
Nitric Acid
Distilled Water
Test tubes, beakers, and flasks.

I'm not able to create an accurate flow-chart that could test for all or any of the nitrate salts. Please help.

[Rhodium]

Using your post subject as a google keyword produced the following image:

http://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter16/Text_Images/FG16_17.JPG