Question

Name the color of the precipitate when sodium hydroxide solution is

added to each of the following aqueous solutions: [5]Calcium chloride​

Answer 1

Answer:

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Explanation:

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

Chemical test Observation Conclusion

To solution X, ammonium hydroxide is added in minimum quantity first and then in excess. A dirty white precipitate is formed which dissolves in excess to form a clear solution.  

To solution Y ammonium hydroxide is added in minimum quantity first and then in excess. A pale blue precipitate is formed which dissolves in excess to form a clear inky blue solution.  

To solution W a small quantity of sodium hydroxide solution hydroxide solution is added and then in excess. A white precipitate is formed which remains insoluble.  

To a salt Z calcium hydroxide solution is added and then heated.  A pungent smelling gas turning moist red litmus paper blue is obtained.

Answer 2

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