[clout90265]

A strip of Scandium metal, Sc, is placed in a beaker containing concentrated nitric acid. A brown gas rapidly forms, the scandium disappears, and the resulting liquid is brown-yellow but becomes colorless when warmed. These observations best support which of the following statements?

 ;Da.   Nitric acid is a strong acid.
b.   In solution, scandium nitrate is yellow and scandium chloride is colorless.
c.   Nitric acid reacts with metals to form hydrogen. C; not sure because most of the statements are supported.
d.   Scandium reacts with nitric acid to form a brown gas.
e.   Scandium and nitric acid react in mole proportions of 1 to 3.

[organic_god]

i don't know if they are all true.

But based on what you see happening only D can be confirmed.


This test doesnt necessarily prove nitric acid is a strong acid.
scanadium chloride isnt even produced so b doesnt work.
you havent tested the gas so you cant be sure its hydrogen
and you havent measured any quantities so e doesnt work.

say what you SEE this is what the question wants