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  4. The volume ratio of 6N and 2N HCl required to prepare 100 mL of 5N HCl is

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Q. The volume ratio of 6N and 2N HCl required to prepare 100 mL of 5N HCl is

NTA AbhyasNTA Abhyas 2020Some Basic Concepts of Chemistry

Solution:

Let $\text{a} \, \text{mL}$ of $\text{6N}$ and $\left(\text{100} - \text{a}\right) \, \text{mL}$ of $\text{2N}$ are mixed

So $6a+2\left(\right.100-a\left.\right)=100\times 5$

$\text{a} \, \text{=} \, \text{75} \, \text{mL,} \left(\text{100} - \text{1}\right) \, \text{=} \, \text{25} \, \text{mL}$