In the extraction of Fe(III) into diethyl ether, it is desired that the final acid concentration should be 1.0 M to 25 $m L$ $mL$ of the iron solution prepared in 1.0 M $H C l$ $HCl$ . What volume of 12.0 M $H C l$ $HCl$ should be added so that the final strength becomes 7.0 M?

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In the extraction of Fe(III) into diethyl ether, it is desired that the final acid concentration should be 1.0 M to 25 $m L$ $mL$ of the iron solution prepared in 1.0 M $H C l$ $HCl$ . What volume of 12.0 M $H C l$ $HCl$ should be added so that the final strength becomes 7.0 M?

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Answer 1 · 2016-05-02T16:29:35

$30 m L$ $30mL$

Explanation:

The question is not clear enough

I proceed as I understand.
Initial volume of acid is
$V_{1} = 25 m L$ $V_1=25mL$

Initial strength of acid is
$S_{1} = 1 M$ $S_1=1M$

Let xmL of 12M HCl to be added with 25mL 1M HCl to have (25+x)mL 7M final solution

So $V_{2} = x m L and S_{2} = 12 M L$ $V_2=xmL and S_2=12ML$

Again $V_{3} = 25 + x m L and S_{3} = 7 M$ $V_3=25+x mL and S_3=7M$

So $V_{1} S_{1} + V_{2} S_{2} = V_{3} S_{3}$ $V_1S_1+V_2S_2=V_3S_3$
$\Rightarrow 25 \cdot 1 + x \cdot 12 = (25 + x) \cdot 7$ $=>25*1+x*12=(25+x)*7$
$\Rightarrow 5 x = 150$ $=>5x=150$
$\Rightarrow x = 30 m L$ $=>x=30mL$

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In the extraction of Fe(III) into diethyl ether, it is desired that the final acid concentration should be 1.0 M to 25 $m L$ $mL$ of the iron solution prepared in 1.0 M $H C l$ $HCl$ . What volume of 12.0 M $H C l$ $HCl$ should be added so that the final strength becomes 7.0 M?

1 Answer

Explanation:

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Science

Math

Humanities

... and beyond

In the extraction of Fe(III) into diethyl ether, it is desired that the final acid concentration should be 1.0 M to 25 mLmL of the iron solution prepared in 1.0 M HClHCl. What volume of 12.0 M HClHCl should be added so that the final strength becomes 7.0 M?

1 Answer

Explanation:

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In the extraction of Fe(III) into diethyl ether, it is desired that the final acid concentration should be 1.0 M to 25 $m L$ $mL$ of the iron solution prepared in 1.0 M $H C l$ $HCl$ . What volume of 12.0 M $H C l$ $HCl$ should be added so that the final strength becomes 7.0 M?