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ICSE Class 10 Answered

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 | 04 May, 2015, 06:43: PM
answered-by-expert 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 | 04 May, 2015, 06:50: PM

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