Question

200 mL 0.25 M of a solution was diluted to 2 L . Find the resultant molarity.

Answer 1

Answer:

We know that the relation between the molarity and the volume is as follows...

Molarity=w/GMW×1000/volume

Here m is inversely proportional to the volume......

Now, M1/M2=V2/V1

0.25/M2=2/200×10-³

0.25/M2=10

M2=0.025

The resultant molarity is 0.025m

Explanation:

Hope it helps you frnd......

Answer 2

Given :

▪ Initial volume = 200ml

▪ Initial molarity = 0.25M

▪ Final volume = 2L

To Find :

▪ Final molarity of the solution.

Molarity :

➜ Definition :Number of moles of solute dissolved in one litre of solution.

➜ Symbol : M

➜ Formula :

Molarity = (Moles of solute) ÷ (Volume of solution in L)

Calculation :

☞ Moles of solute remains constant, So we can say that

⇒ M¹V¹ = M²V²

⇒ 0.25 × 0.2 = M² × 2

⇒ M² = 0.05/2

⇒ M² = 0.025 mol/L