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  4. There are two aqueous HCl solutions kept in different vessel. <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/c-fjqrofjxhdjvpac7.jpg /> How much solution-2 should be added to solution-1 in order to make 2.5M HCl solution?

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Q. There are two aqueous $HCl$ solutions kept in different vessel.
Question
How much solution-2 should be added to solution-1 in order to make $2.5M$ $HCl$ solution?

NTA AbhyasNTA Abhyas 2022

Solution:

$2\times 500+5\times V_{1}=2.5\times \left(500 + V_{1}\right)$
$1000+5V_{1}=1250+2.5V_{1}$
$2.5V_{1}=250$
$V_{1}=100ml$