Answer to Question #107277 in Inorganic Chemistry for nigel

Question #107277
can potassium carbonate remove calcium hardness from water instead of Sodium Carbonate,
I have a KCl solution 20g/l with Calcium 500mg/l, I would normally use Na2CO3 to remove the calcium
1
Expert's answer
2020-04-02T09:01:36-0400

can potassium carbonate remove calcium hardness from water instead of Sodium Carbonate,

I have a KCl solution 20g/l with Calcium 500mg/l, I would normally use Na2CO3 to remove the calcium


Solution:

yes you can


now as equation goes

2KCl+CaSO4+H2O=K2SO4(aq)+CaCl2


hence 1 mole of K2CO3 reacts with one mole of CaSO4

20g KCl=20/74=0.27 mol

0.5 g CaSO4=0.5/136= 0.00367 mol


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Comments

Assignment Expert
08.04.20, 20:43

Dear Nigel , Questions in this section are answered for free. We can't fulfill them all and there is no guarantee of answering certain question but we are doing our best. And if answer is published it means it was attentively checked by experts. You can try it yourself by publishing your question. Although if you have serious assignment that requires large amount of work and hence cannot be done for free you can submit it as assignment and our experts will surely assist you.

Nigel
03.04.20, 03:10

interesting... Normally Na2CO3 is added to precipitate Ca as CaCO3 so I was wondering if K2CO3 could be substituted to precipitate CaCO3

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