Question

4 litres of water are added to 2L of 6 molar HCl solutions.What is the molarity of
resulting solution?

Answer 1

Answer:

Molarity of 4 L water is 2 M.

Explanation:

Molarity is define as numbers of moles of solute present in unit volume of solution in litre.

Unit of Molarity is Moles per liter.

It has effect of temperature.

We have dilution formula for Molarity.

$\displaystyle M_1V_1=M_2V_2$

Given :

$\displaystyle V_1=4L\\\\\displaystyle V_2=2L+4L=6L\\\\\displaystyle M_1=6M\\\\\displaystyle \text{We have to find M_2 }$

Put the value in formula we get

$\displaystyle M_2\times6=2\times6 \ M\\\\\displaystyle M_2\times6=12 \ M\\\\\displaystyle M_2=\dfrac{12}{6} \ M\\\\\displaystyle M_2=2 \ M$

Thus the Molarity of 4 litres of water is 2 M .

Answer 2

GIVEN :

4Liters of water are added to 2L of 6 molar HCL solutions.

Volume - 1 = 2L

Volume - 2 = 2 + 4 = 6L

Molar - 1 = 6M

Molar - 2 = ?

We need to find M2,

We know that,

Molar formula = M1 × V1 = M2 × V2

6 × 2 = M2 × 6

12 = M2 × 6

M2 = 12/6

M2 = 2M

Therefore, the resulting molarity of solution is 2M.