ie Name Section 1. Write the balanced equation for the reaction of barium nitrat
ID: 551989 • Letter: I
Question
ie Name Section 1. Write the balanced equation for the reaction of barium nitrate with sodium chromate. Is this an exchange reaction? If so, be sure to indicate the precipitate. 2. Write the balanced equation for the reaction of coppert) nitrate with potassium bromide. Is this an exchange reaction? If so, be sure to indicate the precipitate. A student is given an unknown to identify. The unknown is colorless, odorless, and neutral. It produces no precipitates when reacted with any of the three halides, CI, Br, and I.It produces a yellow precipitate when added to sodium chromate. Which of the following could it be? Write its exchange reaction with sodium chromate. HC NaOH NH OH BaC AgNO, NiSO A second student in the lab is given the same list of possibilities as the student in question 3 above. This unknown, while also colorless, odorless and neutral, gave a brownish precipitate when mixed with NaOH, and a white precipitate when added to BaCI, Reactions with the other halides gave yellow precipitates. What unknown do they have? Write the equation for the exchange reaction with the unknown and NaOH. Also, write the balanced reaction between the unknown and BaCl, 4.Explanation / Answer
Ans 1
Ba(NO3)2 + Na2CrO4 - - - - > BaCrO4 (s) + 2 NaNO3
Barium nitrate + sodium chromate = barium chromate (precipitate) + sodium nitrate
Ans 2
Balanced equation:
Cu(No3)2 + 2 KBr = CuBr2 (s) + 2KNo3
Copper Nitrate + Potassium Bromide = Copper Bromide (precipitate) + potassium nitrate
All other compounds are in aqueous phase
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