Answers

2015-10-31T19:47:08+05:30
Ya it can remove permanent hardness. temporary hardness can be removed by simply boiling . eg in mag. bicarbonate & cal carbonate hardness can be removed by simply boiling
 
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But temporary hardness has got bicarbonates. so can sodium carbonate displace the Ca and Mg ions in hardwater of temporary hardness?
but if boiiling removes it then whats the need of using sodium carbonate?????
but can it be removed by sodium carbonate was my question? i know that boiling removes it.
yes ......