Question

500 ml water is added to 500ml of 0.2 M solution .What is the molarity of the diluted solution is ?​

Answer 1

Answer:

Answer:

0.142 M

Explanation:

Well , before going to explanation we must know that what is

Molarity and why do you use Molarity term .

Molarity is nothing but it is numbers of moles of solute present in unit volume of solution in litre.

In term of formula we can write it as

Molarity = Numbers of moles of solute / volume of solution ( L ) .

Molarity is term of concentration in which we find amount of substance per defined space.

Coming back to your question .

Here we will use dilution formula .

\begin{gathered}\displaystyle{i.e. \ M_1V_1=M_2V_2}\\\\\\\displaystyle{We \ have \ M_1=02 \ M \ and \ V_1=500 \ ml}\\\\\\ \displaystyle{M_2 =? \ and \ V_2=Final \ volume=500+200=700 \ ml}\end{gathered}

i.e. M

1

V

1

=M

2

V

2

We have M

1

=02 M and V

1

=500 ml

M

2

=? and V

2

=Final volume=500+200=700 ml

Now putting values in formula we get

\begin{gathered}\displaystyle{0.2\times500=700\times M_2}\\\\\\\displaystyle{M_2=\dfrac{2\times50}{700} \ M}\\\\\\\displaystyle{M_2=0.142 \ M}\end{gathered}

0.2×500=700×M

2

M

2

=

700

2×50

M

M

2

=0.142 M

Thus the Molarity of diluted solution is 0.142 molar .

Important things to know :

Some common terms of concentration are as

1 . Mass percent.

2 . Volume percent.

3 . Molality

4 . Molarity

5 . Normality

And many mores