You should find this link useful: https://www.chemguide.co.uk/analysis/masspec/howitworks.html#top

Also if you are studying UK A-level chemistry I would encourage you to explore the chemguide site. It is pitched at UK A-level and is very extensive in its subject matter. It is also reliable in its information.

Silveracetate would work. The others all more or less not soluble in water.You could try to dissolve silveroxide in nitric acid to produce silver nitrate.  The halogenids can be dissolved in ammonia or Thiosulfate.

I had a practical exam today, which I create solutions of glucose with different concentrations (0%, 0.25%, 0.5%, 1%, 1.5% and 2%), put Benedict's reagent, and observe the color change. In each test tube, I added 1 mL of the solution and 2 mL of the Benedict reagent, total of 3 mL. And then I heated the test tube in a water bath at 50-60 deg C until I observe a color change. The result is attached, where the top one is 2%, 1.5%, 1%, 0.5%, 0.25%, and 0% (very bottom). I expected a color change from blue to red (green, yellow, orange) for each glucose solution, however only red precipitate that appears in my test tube. Besides that, my peers' result showed the expected result (the color gradient). What could be the error behind my result? Thank you.

Think what kind of compound  is Aspirin.
Think of saponification of this  class of compounds.

Red phosphorus is not reacting with water.
White phosphorous does, but it needs alcaline environment.