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  • The density of 4m solution of <img alt="\mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathrm%7BNa%7D_2%20%5Cmathrm%7BS%7D_2%20%5Cmathrm%7BO%7D_3"

The density of 4m solution of \mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3 is 2. 69g \mathrm{mL}^{-1} Calculate the % by weight of \mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3.

Option: 1

42.64%


Option: 2

23.49%


Option: 3

36.78%


Option: 4

11.97%


Answers (1)

best_answer


\mathrm{ m_{\text {solution }}=1000 \times 2.69}

\mathrm{ =2690 \mathrm{~gm} } 


 \text { Mass of } \mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3=4 \times 158

=632


% \omega / \omega=\frac{632}{2690} \times 100

=23.49 %

Posted by

manish painkra

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