I agree with your conclusion.(although my mind is still a little clouded from the Chivas I put away last night)
I clicked on a second page from the Link you provided to the calculator titled  Dilution Calculator-Molarity,Percent, and got the same results.

PS. I didn't Major in Chemistry or Mathematics.
 

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adding 1 gallon of water to 1 gallon of 30% hcl will make it 15% hcl
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Last edited by barnett468 (10/19/2014 8:48 AM)

Please remember:

Always Add Acid

Add the acid to the water and not the other way around to be safe. The acid is the reactant and it is easier to control the reaction this way. For HCl, you shouldn't have any issues, but it is a good idea to build good habits when dealing with chemicals.

BobN

No problems!

I've tried removing rust using electrolysis too as it made me curious when I ran into it when I researched plating and similar stuff. But as always each method to clean parts has it's advantages and disadvantages.

I bought this kit: http://gaterosplating.co.uk/Alkaline-Cleaner.php from the same place where I bought my plating kits and it actually does a pretty good job even stripping paint off from the parts I tried it on. I also tried a homemade mixture using baking soda and with similar results.

An easy way (IMO) to get the required power supply is to use a power supply unit from a desktop PC that if IIRC has 3.3V, 5.0V and 12.0V output.

Here's what my workbench looked like during a couple of month last winter:



From left to right we have the the copper plating tank, the "replica chrome" tank, the greenich liquid is distilled water, above that the acid pickle solution, in the white bucket to the right we have the cleaner.and in front of that a slightly modified PC power supply unit. The "replica chrome" is BTW a mix of nickel and cobolt and here's a couple of M10 bolts that I've plated: