Please wait...
1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days

or

Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number

022-62211530

Mon to Sat - 11 AM to 8 PM

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
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Report an issue
Previous Question
Next Question
Your answer has been posted successfully!

Free related questions

How to prepare ethanoic acid directly from ethanol without using pacidified potassium dichromate solution in two steps ......
31st December 2015, 10:31 AM
 
To get pure copper from impure copper by electrolysis answer the following
 
A.NAme the prosses
 
b.Name the cathode and anode
 
c.Why acid must be present in  the electrolite.
 
d.what willbe the change in the concentration of acid inthe solution t the end of the process.
 
e.If anode is replaced by graphite what will be the change in  the concentration of acid
     after eletrolysis.
 
State your observations at anode and eletrolytes in above two processes.
4th January 2016, 6:05 PM
Why neutron remain attach with the proton in the nucleus whereas it is neutral in nature.
7th January 2016, 11:38 AM
Q.Complete the following conversions indicating conditions in each and every case:
 
i .Methane  to Chloroform.
 
ii.Sodium propanoate  to Ethane.
 
iii.Ethylene bromide to Ethyne.
 
iv.Ethyl alcohol to Acetic acid.
10th January 2016, 3:29 PM
Q. (i)
          Why about 40% of nitrogen and hydrogn remain  nnonreative  in the Haber's process.
 
      (ii) How Ammonia  gas is separated from the mixture.
 
      (iii). Why the separated mixture of Nitrogen and Hydroge recompressed before
             
                recycling.
 
         (iv).Why external heating is stopped soon after the nitrogen and Hydrogen start
 
                  reacting  chemically.
 
         (v).Name the principle which helps to get better yield of Amonia.
10th January 2016, 1:29 PM
RELATED STUDY RESOURCES :
ICSE Class-10 QUESTION ANSWERS