The Following Table Shows the Test a Student Performed on Four Different Aqueous Solutions Which Are X, Y, Z and W. Based on the Observations Provided, Identify the Cation Present: - Chemistry

The following table shows the test a student performed on four different aqueous solutions which are X, Y, Z and W. Based on the observations provided, identify the cation present:

 Chemical test Observation Conclusion To solution X, ammoniumhydroxide is added in minimum quantity first and then in excess A dirty white precipitate isformed which dissolves inexcess to form a clear solution (1) To solution Y ammoniumhydroxide is added in the minimum quantity first and then in excess A pale blue precipitate isformed which dissolves inexcess to form a clear inky bluesolution. (2) To solution W a small quantity of sodium hydroxide solution isadded and then in excess. A white precipitate is formedwhich remains insoluble. (3) To a salt Z calcium hydroxidethe solution is added and thenheated. A pungent smelling gas turningmoist red litmus paper blue isobtained. (4)

Solution

1)Zn2+

2) Cu2+

3) Ca2+

4) NH_4^(+)

Concept: Coordinate Bond
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