Homework Help

Which of the aqueous reagents sodium chloride, barium nitrate and silver nitrate give a...

user profile pic

ishangoenka | eNoter

Posted June 10, 2012 at 9:08 AM via web

dislike 1 like

Which of the aqueous reagents sodium chloride, barium nitrate and silver nitrate give a white precipitate when added to aqueous zinc chloride?

1 Answer | Add Yours

user profile pic

justaguide | College Teacher | (Level 2) Distinguished Educator

Posted June 10, 2012 at 1:40 PM (Answer #1)

dislike 1 like

When aqueous sodium hydroxide is added to zinc chloride, the reaction that takes place is:

ZnCl2 + 2Na(OH) --> 2NaCl + Zn(OH)2 (s)

Sodium chloride is soluble in water while Zn(OH)2 is precipitated as a white powder

When aqueous barium nitrate is added to aqueous zinc chloride there is no chemical reaction as the two chemicals do not react to form an insoluble precipitate which is one of the criteria for a double replacement reaction to take place. There is no formation of a white precipitate in this case.

When aqueous silver nitrate is reacted with zinc chloride the reaction that takes place is:

ZnCl2 + 2AgNO2 --> Zn(NO3)3 + 2AgCl

Silver chloride is precipitated as a white solid.

Sources:

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes