**Contributors to this thread:**
Getting ready for turkey hunting and I always spray my blind with permethrin. After spending $18 for 20 oz of .5% solution I decided to buy a quart of 10% solution. My question is, "how much water do I add to dilute the 10% to end up with .5%?"

or you could use it full strength and nothing would come within ten yards of it.

You don't need water be a man!!

i think this is more a chemistry question than a math question. good luck, but prolly not something i would mess with ..

It works best if you drink it :)

Seriously, add 1 ounce to 2 1/2 cups water to get .05% solution.

Yea, if you don't dilute it, the turkeys might smell it. Worse yet, they smell your smoke from last evenings camp fire, then you're really screwed. :)

2 winners 1:20 and 1 to 2.5 cups of water if u use 8 oz cups ;)

Thanks everybody. I've been able chug half the bottle so far and now I can't smell anything except something similar to lavender body lotion. I think my odds of getting better are 1:20 though.

Always use the following calculation:

C1*V1=C2*V2

If you wanted to make 1 qt of .5% solution it would be

.10*X=.005*32

X=1.6 oz of 10% solution diluted to 32 oz.

Use same calculation for mixing any solution at any concentration.

Tiger brand sells 13.3 % , out of NC 22$ , and it smelsl rough . Yet they have an can of it in a water base at .05% for 7.50$ , with no smell . And you can get both from AceHardware. A safe mix is only .33 oz per gallon. At 10% you should be around 1/2 oz per gallon.

So which is it guys?? A 0.5% solution or a 0.05% solution. Both are mention. One is 10 times stronger than the other. The 1 per 20 and Bowfreaks equation are one and the same and if 0.5% is correct, that is all you need. Not sure if r-man is right since he is quoting the 0.05% solution.

Another way to look at mixing to get .5% is to go 1 part of the concentrate to 19 parts water.

I think somebody better decide the correct decimal placement.

Is it one half of one percent ei. .5 Which would be one to two hundred

Or are you trying to say five percent? Which would be one to twenty.

Better rethink your math ambush. Your calculations would only work if it was a 100% solution.

In the question asked, a 5% solution would be half of a 10%, that would be a 1 to 1 dilution. and the 0.5% is a 1 +19 or 1:20 dilution

In the post with the formula above, he uses 0.005 because that is the same a 0.5% and 0.1 = 10%

Sure TX, but the OP said ".5" percent. To me that would be .50 or fifty percent. But I'm sure he didn't mean that. Hence the question. I would express five percent as .05%, or one to twenty.

Maybe I'm wrong, I failed math in more than one grade.

I remember those types of problems from calculus, but unfortunately that was 40 years ago, therefore not much help

It's .5%. As in .005. I also came up with the same as those that said 1:20. That's what I'm gonna go with as soon as my tummy settles a little. I think I drank too much of a higher concentration solution last night.

Ambush .5% is most definitely not the same as 50%. However .5 multiplied by something is 50% of it. JDM is correct- .5% is .005.

Whether that's the right number to use for mixing the solution I have no idea. I am confident in my math here though.

"Sure TX, but the OP said ".5" percent. To me that would be .50 or fifty percent. But I'm sure he didn't mean that. Hence the question. I would express five percent as .05%, or one to twenty. "

Actually he did not make a mistake because he did say 0.5% and that is evidently what he meant.

Your getting decimals and percentage confused.

50% = 0.5

5% = 0.05

but 0.5% = 0.005 and that is what the OP posted.

He needs to make a 1/2 of 1% solution (0.5%)

I am in the medical field and one thing they teach everyone who deals in dosages of drugs (and chemicals) is that DECIMALS KILL. Move a decimal point just one place in the wrong direction and you give 10x the dosage or 1/10th the dosage.

That explains a couple of things.

Why I often failed at math.

And why I sometimes wake up late and haggard with an empty Crown Royal crock and an almost full can of ginger ale. Figured the percentage wrong again!!

"And why I sometimes wake up late and haggard with an empty Crown Royal crock and an almost full can of ginger ale. Figured the percentage wrong again!!"

Haha, that can happen to me, Ambush, and I'm pretty good at math!

BowFreak is right on. Must have had a lot of chemistry like me :)

Man, you guys can make anything complicated. :)

JDM2, put 3/4 cup of your 10% solution in a gallon jug and fill the rest with water. You will be damn close to .05% (.04918033% to be exact). Then go turkey hunting and let these guys perform rocket surgery.

Lol yeh what Brodsky said!!!

Brotsky,

Please don't rob my one opportunity of looking smart. :)

brotsky: Your end result is what we are all looking for: an easy dilution factor that makes sense and is easy to remember. That said, you had to use math to get to what the correct dilution is :-)

.1 (X oz) = 0.005 (128 oz)

0.1X = 0.64

X = 6.4 oz (aprox 3/4 cup)

See, algebra is helpful in the real world!

HDEs formula is the easiest to remember, but I still remember Bowfreaks method from school and if you can remember it, is the fastest way to get to: "How many ounces to I add to a gallon"

Math? I just stayed at a Holiday Inn Express.

Ok so my question is can anyone answer this by using common core?

I'm so glad my kids are old enough and we didn't have to deal with that common core crap. Kelly I think you just opened up a whole new can of worms there. LOL

I can honestly say that I do not understand common core nor do I want to understand it.

25/5 is always 5, unless you're Ma and Pa Kettle...

Cheesehead Mike's Link
I always thought I'd never use algebra, geometry, trigonometry, calculus, story problems and crap like that and then I became a land surveyor and everything is based on trig and geometry, decimals and percentages and every legal description for a parcel of land is a story problem...

Yeah, its a big story problem if a lawyer wrote the deed. (Wyoming L.S.)

You got that right osage!

"JDM2, put 3/4 cup of your 10% solution in a gallon jug and fill the rest with water. You will be damn close to .05% (.04918033% to be exact). Then go turkey hunting and let these guys perform rocket surgery."

If you are going to go to all that effort, best to spray some of that solution on your clothes (and let them dry) before shooting turkeys... 8^)