For any chemists out here, a question. It's been a long while since I did any dilution calculations and want to make sure I haven't lost my marbles.

So I have 1 liter containing 40,000 ppm of some substance X.

I combine this with 3 liters containing 1,000 ppm of substance X.

This results in what?

4 liters containing: (1 x 40,000 + 3 x 1,000) / (1 + 3) =

4 liters containing 10,750 ppm of substance X. Right?

Or have I lost the plot here?

@jellycrystals Yeah, it turns out I did have it right but I gave a confusing example. (The problem I'm working on involves ppm, parts per million, so that's how I was thinking.)

Let's say we have solutions of salt in water. I have one liter of a 4% solution and three liters of a 1% solution.

Combine it all to make 4 liters of a 1.75% solution.

(C1*V1 + C2*V2) / (V1+V2)

Sorry about poorly stating the problem.

@jellycrystals Yeah, it turns out I did have it right but I gave a confusing example. (The problem I'm working on involves ppm, parts per million, so that's how I was thinking.)

Let's say we have solutions of salt in water. I have one liter of a 4% solution and three liters of a 1% solution.

Combine it all to make 4 liters of a 1.75% solution.

(C1*V1 + C2*V2) / (V1+V2)

Sorry about poorly stating the problem.

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