Hi:

Yes but if I do this, I have to mix it up in a separate container and repour
etc.  I was trying to avoid this.  I was trying to determine how much 35% to
put in the bottle to start with so I wouldn't have to mix and repour.

Ian Roe

----- Original Message -----
From: "Dean Miller" <[email protected]>
To: <[email protected]>
Sent: Tuesday, December 03, 2002 6:07 PM
Subject: Re: CS>Titration Math


> On Tue, 3 Dec 2002 15:53:45 -0500, "Ian Roe" <[email protected]>
> wrote:
>
> >Can someone here show me the formula for dilution. I knew how to do this
once but I just can't remember now.
> >
> >Problem: wish to put an unknown volume of 35% H2O2 into a 250 ml and a
500 ml container and fill with distilled water to obtain 3%.
>
> If you're not too picky (IOW, you want something close to 3% and
> aren't using it for quantitative analysis), and since H2O2 and water
> have about the same weight per volume -- just mix 1 part H2O2 with 11
> parts of water.  That'll produce about 3% H2O2.  (A 1/9 mixture will
> be 3.5%).


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