Question

7) The concentration of LiOH is 0.50 mol/dm3. If 25 ml of LiOH is needed to titrate 40 ml of HNO3 (nitric acid) what is the concentration of HNO3?

Answer 1

Answer:

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Explanation:

Answer 2

Given:

The concentration of LiOH is 0.50 mol/dm3.25 ml of LiOH is needed to titrate 40 ml of HNO3

To Find:

The concentration of HNO3.

Solution:

To find The concentration of HNO3 we will follow the following steps:

As we know,

M1V1 = M2V2

Here, M is denoting molarity in mol/litre.

and V is the volume in litre.

M1 is the molarity of LiOH and M2 is the molarity of HNO3.

Now,

Putting the values in the above equation we get-

$0.50×25 =40×M2$

$M2 = \frac{0.50 \times 25}{40}$

$M2 =0.31M$

Henceforth, the concentration of HNO3 is 0.31M.