Question

What is the molarity of a 250ml KCl solution made by diluting 175mL of a 3.00 M solution?

Answer 1

2.1 M

Step-by-step explanation:

The dilution equation is
.

= the molarity of the sock solution

= the volume of the sock solution

= the molarity of the diluted solution

= the volume of the diluted solution

The stock solution would be what is doing the diluting, so "175 mL of a 3.00 M solution". So
= 3.00 M. Then: Converting 175 mL to liters:
(This is
)

And converting 250 mL KCl to liters:
(This will be
)

Then, we plug in our given into the dilution equation, resulting in:

(divide both sides by 0.250 L, in order to get
by itself)

So, the molarity of 250 mL KCl made by diluting 175 mL of a 3.0 M solution would be 2.1 M (mol/L).

Hopefully this helped you understand the topic a little bit better. I just finished molarity and dilutions in Chemistry last week. Good luck!