Question

200ml of water is added to 500ml of 0.2m solution what is its molarity of diluted solution

Answer 1

Answer:

heyaa

 500 x 0.2/700 =0.1429 M If water is added to 10 cm3 of an unknown concentration of an NH4OH solution until the mixture reaches 250 ml, and 10 ml of it is used to neutralize 24.5 ml of 0.5M H2SO4, what is the molarity of the original sample (10ml)? 50.

i hope its help u

Answer 2

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 .

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

Now putting values in formula we get

$\displaystyle{0.2\times500=700\times M_2}\\\\\\\displaystyle{M_2=\dfrac{2\times50}{700} \ M}\\\\\\\displaystyle{M_2=0.142 \ M}$

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.