Question

Calculate the number of moles in HCl, required to make 0.2 molar (M) solution in 500 ml.

Answer 1

Hello,

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Solution:
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Molarity = No. of solute / Volume of solution in L

0.2 = n / 500 / 1000

0.2 × 0.5 = n

0.10 = n

Therefore, n = 0.1 mol

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Answer 2

To calculate :

The number of moles in HCl, required to make 0.2 molar (M) solution in 500 ml.

Solution :
Molarity = 0.2 moles
Volume of solution = 500 ml = 0.5 l

As we know,

$molarity = \frac{number \: of \: solute}{voume \: of \: solution}$

Using the above formula:

0.2= n/0.5

0.2×0.5=N

0.10=N

Number of solute = 0.1 mole .

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