Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and the Yahoo Answers website is now in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Dilution Ratios With HC-110?
I'm using HC-110, from concentrate, which requires the use of dilutions to get a desired effect. I'm familiar with dilution B, a 1:31 solution, but I'm not sure how to get this dilution from the stock solution. To get the stock, you take 1 part concentrate to 3 parts water, or 1:3. Then add that 1:3 solution to a 1:7 of water. This is dilution B. My question is, how does this work out, mathematically speaking? More specifically, how would I solve this on a calculator, or in my head? (I'm not sure how you get 1:31 from adding 1:3 and 1:7. Thanks for any help.
1 Answer
- injanierLv 71 decade agoFavorite Answer
The math will work out if you look at the concentration in the solution, not the mixing ratios. Mixing 1 part of developer in three of water gives you a solution that is 1/4th developer. Mix that with 7 times as much water and you have a dilution of 1/32nd, which is dilution B.
But the short answer is, there is really no point in storing partial dilutions because they don't keep as well as the concentrated developer. Use a syringe or lab graduate to precisely measure small amounts and mix dilution B straight from the bottle. The only rationale for the two-step dilution is that it gives more consistent results if you're trying to mix up half a pint using kitchen measuring tools.
Source(s): used to do this, many years ago...