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Home / Doubts and Solutions/ICSE/Class 10/Chemistry

Write the observations and balanced equations for the following reactions.
 
1.Sodium Hydroxide is added dropwise till in excess to a solutions of zinc sulphate.
2.Ammoium hydroxide is added first in small quantity and then in excess to the solution of copper sulphate.
 

Asked by sreenivasanmaralapadu 4th May 2015, 6:43 PM
Answered by Expert
Answer:

Dear Abhilasha,

Please post one question at a time.

Answer to your first question is given below.

ZnSO4  + 2NaOH  →   Zn(OH)2         + Na2SO4

                                     (White,          (Colourless)

                                    gelatinous ppt.) 

 

Soluble

Zn(OH)2 + 2NaOH(excess)  →  

                                                 Na2ZnO2  + 2H2O

(Colourless)
Answered by Expert 4th May 2015, 6:50 PM
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