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Re: promise you guys this is my last math question

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superspy468 is not online. superspy468
Joined: 29 May 2009
Total Posts: 53408
04 Jun 2014 09:49 PM
first detailed explanation gets 615 tix, all I have left

PROBLEM:
Find the concentration of hydrogen ions (H+) in moles per liter when the pH of the liquid is 10.13


looks easy
I just don't know what to input in my calc
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wazap is not online. wazap
Joined: 29 Jun 2007
Total Posts: 23234
04 Jun 2014 09:50 PM
dont pay me this time

10^-pH = [H+] in moles/liter

10^-10.13 will get you the answer
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superspy468 is not online. superspy468
Joined: 29 May 2009
Total Posts: 53408
04 Jun 2014 09:51 PM
ty waz
also
^ = exponential or multiplication?
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wazap is not online. wazap
Joined: 29 Jun 2007
Total Posts: 23234
04 Jun 2014 09:52 PM
^ always means exponential. It never means multiplication.
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superspy468 is not online. superspy468
Joined: 29 May 2009
Total Posts: 53408
04 Jun 2014 09:54 PM
Alright, thanks.
I've seen it used both ways before, that's why I was unsure.
Answer is 7.41310241 E-11, correct?
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wazap is not online. wazap
Joined: 29 Jun 2007
Total Posts: 23234
04 Jun 2014 09:54 PM
That looks about right.
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superspy468 is not online. superspy468
Joined: 29 May 2009
Total Posts: 53408
04 Jun 2014 09:55 PM
Awesome, thanks again, can't tell you how much I appreciate it.
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Europeancow2 is not online. Europeancow2
Joined: 02 Aug 2009
Total Posts: 37979
04 Jun 2014 09:55 PM
ya

always remember

pH is between 1-14

if you get one below 1 or above 14

it's wrong
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Europeancow2 is not online. Europeancow2
Joined: 02 Aug 2009
Total Posts: 37979
04 Jun 2014 09:56 PM
superspy are you taking chem anytime soon

cus if you are

you'll learn thisssss

it's easier in chem for whatever reason than when i did it in math

idk i hate math
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wazap is not online. wazap
Joined: 29 Jun 2007
Total Posts: 23234
04 Jun 2014 09:57 PM
welcome @super

@European

0-14

And also I dont mean to confuse ppl but.

2 moles of H2SO4 in 1 liter of water

pH = -2
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Mixernxer is not online. Mixernxer
Joined: 06 Sep 2008
Total Posts: 14112
04 Jun 2014 09:57 PM
Lol wtf

H= ions is for bases.

ph= concentration of h30 ions..
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Europeancow2 is not online. Europeancow2
Joined: 02 Aug 2009
Total Posts: 37979
04 Jun 2014 09:57 PM
oOoOoOoook then dont make it hard for superspy omg
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superspy468 is not online. superspy468
Joined: 29 May 2009
Total Posts: 53408
04 Jun 2014 09:58 PM
thanks guys
I had to pay for my schooling this year since my dad got laid off and stuff
I didn't have the extra cash to pay for chem, that's partly why I've never seen this stuff before
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wazap is not online. wazap
Joined: 29 Jun 2007
Total Posts: 23234
04 Jun 2014 09:59 PM
@Mixer thats OH-

And I screwed up my calculations its not -2 but its still negative...

But FOR ALL PURPOSES pH IS FROM 0-14.
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Europeancow2 is not online. Europeancow2
Joined: 02 Aug 2009
Total Posts: 37979
04 Jun 2014 09:59 PM
it's ok

im here for the easy stuff in chem

and a bunch of other people who'll make it harder for you are here too
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Europeancow2 is not online. Europeancow2
Joined: 02 Aug 2009
Total Posts: 37979
04 Jun 2014 10:00 PM
dont confuse him with negative pH

Molarity of 2 is something new 2 him
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wazap is not online. wazap
Joined: 29 Jun 2007
Total Posts: 23234
04 Jun 2014 10:02 PM
Ya I didnt mean to, but just a head's up because I came across it once and it confused me, even though it was correct.
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Aczero is not online. Aczero
Joined: 17 Dec 2012
Total Posts: 13533
04 Jun 2014 10:02 PM
o im confused
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Europeancow2 is not online. Europeancow2
Joined: 02 Aug 2009
Total Posts: 37979
04 Jun 2014 10:02 PM
ya i looked it up it exists

but it's really uncommon
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Mixernxer is not online. Mixernxer
Joined: 06 Sep 2008
Total Posts: 14112
04 Jun 2014 10:04 PM
sorry got confused I forgot h+ is considered h30

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superspy468 is not online. superspy468
Joined: 29 May 2009
Total Posts: 53408
04 Jun 2014 10:04 PM
wait
how can ph be negative
wouldn't that be like impossible
because it doesn't work in current environment and humanity and stuff
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Europeancow2 is not online. Europeancow2
Joined: 02 Aug 2009
Total Posts: 37979
04 Jun 2014 10:05 PM
yes negative pH doesnt work for humanity

that's a concept for another day

dont even know myself
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superspy468 is not online. superspy468
Joined: 29 May 2009
Total Posts: 53408
04 Jun 2014 10:06 PM
oh dang
alright, you guys blew my sophomore mind
xd
thanks again guys
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Mixernxer is not online. Mixernxer
Joined: 06 Sep 2008
Total Posts: 14112
04 Jun 2014 10:06 PM
If the molarity of hydrogen ions is greater than 1, you'll have a negative value of pH
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