what test would you form to verify the presence of the Na+4 and the Po4,3-ion in plant food
Na+4 doesn't exist because sodium can only give away one electron because that's all it has.
But maybe you are trying to say...
Na3PO4---> 3Na^+ + PO4^-3
You would need the chemical formula for plant food to see what it produces as products.
To verify the presence of the Na+ and PO4^-3 ions in plant food, you can perform the following test:
1. First, prepare a small sample of the plant food by taking a known quantity (e.g., a teaspoonful) and placing it in a test tube or a small beaker.
2. Add distilled water to the sample, ensuring that it is fully immersed and well mixed. This will help to dissolve the ions from the plant food into the solution.
3. Perform a flame test to identify the presence of sodium (Na+). Take a clean platinum wire loop and dip it into the prepared solution. Hold the wire loop in the flame of a Bunsen burner or a gas stove. If sodium ions are present, the flame would turn a bright yellow color.
4. For the identification of the phosphate ion (PO4^-3), proceed with the ammonium molybdate test. To do this, take a small portion of the prepared solution from step 2 and transfer it to another clean test tube.
5. Add a few drops of ammonium molybdate solution (NH4)2MoO4 to the test tube containing the sample. Shake the contents of the test tube gently to mix them.
6. Heat the test tube over a Bunsen burner or a hot plate gently. The presence of phosphate ions will be indicated by the formation of a yellow precipitate, known as ammonium phosphomolybdate (NH4)3PO4•12MoO3.
It is important to note that these tests are qualitative in nature and can only confirm the presence of sodium and phosphate ions in the plant food sample. For a more accurate and quantitative analysis, further laboratory tests and equipment may be required.