Question

# Suppose 5.00 mL of a 1.00 M stock solution is diluted to 25.00 mL. Afterwards, 5.00...

Suppose 5.00 mL of a 1.00 M stock solution is diluted to 25.00 mL. Afterwards, 5.00 mL of this solution is diluted to 25.00 mL. What is the concentration of the final solution?

Here we have to use the dilution formula in order to find the concentration.

Dilution formula: C1V1=C2V2 Where C= concentration and V= volume

Given, C1= 1.00M , V1= 5.00mL and V2= 25.00mL

On substituting; 1.00M X 5.00mL = C2 x 25.00mL

C2= 0.2M

Now 5.00mL of this 0.2M solution is diluted with 25.00 mL

So the concentration of final solution will be:

0.2M X 5.00mL = C2 X 25.00mL

C2= 0.04M

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