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  • Borax is used as Option: 1 Oil cleaner Option: 2 Water softener <b

Borax is used as 

Option: 1

Oil cleaner 


Option: 2

Water softener 


Option: 3

to prepare acidic medium 


Option: 4

none 


Answers (1)

best_answer

As we have learnt, 

Borax is used as a water softener as it can react with \mathrm{Ca^{2+}} and \mathrm{Mg^{2+}} thereby removing them from water sample. The reactions occur as:

\mathrm{Ca ^{2+}{ }{( aq )}+ Na _{2} B _{4} O _{7} \text { (aq) } \rightarrow Ca B _{4} O _{7}( s ) \downarrow+2 Na ^{+}{ }{\text {(aq) }}}

\mathrm{Mg ^{2+} \text {(aq)}+ Na _{2} B _{4} O _{7} \text {(aq)} \rightarrow Mg B _{4} O _{7} \text {(s)} \downarrow+2 Na ^{+}{ }{\text {(aq) }}}

Therefore, option (2) is correct.

Posted by

Ritika Jonwal

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