Chemistry Net Ionic Reactions

Chemistry
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Chromium and cadmium can be removed from waste water by treatment with sod

Oct 20th, 2015

Thank you for the opportunity to help you with your question!

net equation for the removal of Cr3+

Cr3+(aq) + 3 OH-(aq) ---> Cr(OH)3 (s)

for the removal of Cadmium

Cd2+ (aq) + 2 OH- (aq) ----> Cd(OH)2 (s)

Please let me know if you need any clarification. I'm always happy to answer your questions. Kindly best this answer if it has helped you.
Oct 20th, 2015

Thank you I appreciate it but its not right. removal of  Cr3+ and Cd2+ but how each one reacts with the NaOH seperatly 

Oct 20th, 2015

When we write ionic equation for NaOH, we show its ionic part, that is OH- . So chromium and cadmium will react with NaOH as shown above and later they can be separated as they form precipitate which could be filtered out.

Above answer is right.

Oct 20th, 2015

Thank you I appreciate it but its not right. I didnt need to know the removal of  Cr3+ and Cd2+ but how each one reacts with the NaOH seperatly 

Oct 20th, 2015

NaOH --> Na+  + OH-

Oct 20th, 2015

Sorry but my computer telling me its wrong 

Oct 20th, 2015

Above equation shows the reaction of Cr and Cd ions with NaOH, but as we are writing in ionic forms, OH- is written instead of NaOH

Oct 20th, 2015

Okay I get it thank you : )

Oct 20th, 2015

I am 100% sure about the correctness of above equation. You may try changing the notation. You can try the different notation . Write NaOH instead of OH-.

Oct 20th, 2015

okay thank you can u also help me with this question 

Please write the balanced molecular and net ionic equations for the reaction between aluminum metal  and silver nitrate .Also Identify the oxidation and reduction half-reactions 

Oct 20th, 2015

You will have to post this question separately.

Oct 20th, 2015

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