QUESTION 9 2 points Save Answer Kemmi Major has an unknown salt containing one o

Question

QUESTION 9 2 points Save Answer Kemmi Major has an unknown salt containing one of the nine anions used in this lab. She dissolves some of the salt and adds barium chloride (classification test A); a white solid forms. She then adds 3 M nitric acid, and the solid dissolves quickly again without bubbling. She adds 3 M sulfuric acid to a new sample of the salt (classification test B), but no reaction occurs. Finally she takes a third portion of the salt and adds first silver nitrate solution and then 3 M nitric acid (classification test C). A yellow solid forms initially but then dissolves in the acid. Which confirmation test should Kemmi choose to try? P2 QUESTION 10 2 points Save Answer Doc Inmaking has a different unknown salt containing one of the nine anions used in this lab. He dissolves some of the salt and adds barium chloride (classification test A). Then he adds 3 M nitric acid. The white solid that formed with barium does not dissolve in the acid. When he tries classification tests B and C on fresh portions of his salt, no reaction occurs. Which confirmation test should Doc choose to try? PA O so 42-0 sof O cof OPO43-0 NO3. O NO20 halides (cr, Br.n

Explanation / Answer

for the first problem we can visualize from classification test C,

the reaction of AgNO3 which leads to a yellow color solid, this is because of the formation of AgBr, which is pale yellow in color. so it confirms that salt contains halide ion Br-

for the second reaction, only BaSO4 is one of the compound which doesn't dissolve in nitric acid. and BaSO4 also not react with sulphuric acid. It does react with AgNO3 bur doesn't give a yellow precipitate. so for the Second reaction, the ion present is SO4 2- .

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