misc Mathematical question

[Tinkerbelle]

If I've bought "10 volumes 125ml" H2O2 and need 3% dilution per pint of water for soaking seeds - how much do I need to dilute it by?
Explain it to me as though I'm 6 years old
Yes I'm crap at math and photography

 

[SineNomine]

I don't understand your question, but I can tell you how I proceed. I use one part H2O2 and nine parts distilled water.
Concretely, I put 10 ml of H2O2, 3% in a graduated cylinder or with a syringe and add 90 ml of distilled water on top.
For me, this amount is enough to soak many seeds. If you want more, double or triple the volumes.

L.E.: Ahh, I think I understand the question.
To bring the 125 ml 10% solution to 3%, 291.67 ml of distilled water must be added.
You will end up with 416.67 ml of 3% H2O2.

 

[Bou]

Just add 1 tea spoon of 3% H2O2 to 250 ml of water and you'll be good!

 

[Tinkerbelle]

I don't understand it either Not sure if it means 10% H2O2 and I have to dilute it to get 3%.
But I understand your answer Vivi

Whoops posted before I saw your comment Bou, thank you

 

[Bou]

Sorry Tink, I edited my post while you liked it!

 

[Bou]

Besides, common store bought peroxyde (3% by vol) isn't that toxic. For what it's worth I used to soak older seeds with undilluted 3% H2O2 for about an hour to help kikstart the germination process before transfering them to the regular dilution for 24 hours. I don't think I ever killed seeds doing so!

 

[SineNomine]

In the meantime, I also edited.

 

[bob65]

10 volume H2O2 is a 3% solution

 

[ahayastani]

Concretely, I put 10 ml of H2O2, 3% in a graduated cylinder or with a syringe and add 90 ml of distilled water on top.

You can also use a weighing scale if you don't have a graduated cylinder. Because the density of diluted H2O2 ~ water > weigh 10 g 3% H2O2 and dilute with H2O until reaching 100 g.

 

[The Hot Pepper]

10 volume H2O2 is a 3% solution

Correct

The term "10V = 10 volumes" means that one liter of solution can release 10 liters of active oxygen. Hydrogen peroxide concentrated at 3% (97% water and 3% peroxide): it is medical grade peroxide like hydrogen peroxide officinalis or in supermarkets.

 

[Ratatouille]

Now I'm confused.

 

[The Hot Pepper]

No dilution is needed. 10V = 3%, 20V = 6%...

 

[Tinkerbelle]

ok got it - thank you all

 

[ahayastani]

Now I'm confused.

Historically, various chemical industries have developed their own "standards" based on their needs. As an outsider, the different ways of looking at the same thing can be confusing. Nothing to be ashamed about.

 

[Ratatouille]

Nothing to be ashamed about.

Luckily I'm not one to be shamed easily.