I'm not going to give you all the answers! I would strongly recommend you construct some sort of flow chart for identification of all of your compounds. Start with pH, and separate the compounds by whether they are acidic, basic, or neutral. Then look at the compounds in each group, think of some property that might separate them further (maybe conductivity or solubility, maybe something else), and repeat until you have a clear path for identifying each compound. If you look it up online, you will find a lot of examples of what I mean. I had a go at making one myself, and I think you can come up with something mostly using methods that have already been mentioned here, or that you yourself have done.