Subject changed.
Hi Dee,
Use 1.5 oz of the 35% into the 16 oz bottle and use distilled water to
fill up to the top of shoulder of the bottle just as it becomes a neck.
The arithmetic for above 1.5 oz (one and a half ounces) made up to 16 oz
with distilled water is :
1.5/16 * 35 = 3.28%
which is just under 3.5%
More exact would be to use 1.6 oz made up to 16oz .
That would be 1.6/16 * 35 = 3.5 %
OK,
Tony
On 14 Apr 2010 at 14:07, Dorothy Fitzpatrick wrote about :
Subject : Re: CS>where is everyone?/..."TAITP
> Sorry David this seems complicated to me (math moron that I am) I have
> a sixteen ounce bottle (used formerly to house 3% store- bought HP) and
> I want to know how much 35% HP to put in if I fill it with DW. It has
> to be really simple I'm afraid <lol> dee
>
> On 14 Apr 2010, at 05:01, David Bearrow wrote:
>
> > Oy. Look at it like this:
> > 35% = 100, divide both by 2
> > 17.5% = 50, divide both by 2
> > 8.75% = 25, divide both by 2
> > 4.375% = 12.5
> >
> > What that mean? You take the 35% peroxide and mix in an equal amount
> of
> > water and it divides it in half making it 17.5%. If you started with
> 1/4 cup
> > of 35% peroxide mix in 1/4 cup water. This gives you 1/2 cup of
> 17.5%
> > peroxide. Mix in 1/2 cup of water to the 1/2 cup of 17.5% peroxide you
> just
> > made. This gives you 1 cup of 8.75% peroxide. Mix in 1 cup of water to
> the 1
> > cup of 8.75% peroxide you just made. This gives you 2 cups of 4.375%
> > peroxide. To me thats close enough to 3.5%.
> >
> > David
> >
>
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