1. Does a cloudy result upon the addition of water denote that a substance is soluble? Why or why not?
2. What clues did you observe when testing the known solids that denote chemical reactivity?
3. What other clues might oyu observe in other experiments that also denote chemical reactivity?
4. Why were different colors observed when using universal indicator?
5. Why was acid alone tested with indicator first?
6. How are unknown substances identified in the labortory?
7. What information do you have that will help you identify your unknown?

Formation of a cloud indicates that some thing has come out in solid form which is insoluble.hence it means it is insoluble.