i need help with chemistry.

Daksha Cromwell

i need help with chemistry.

i have a big test this wednesday and i can’t figure out some of the easiest formulas and everything. i have forgotten most of the stuff that we did during the first semester, like how to dilute molar concentrations, and my teacher is rather confusing so i have a bit of trouble learning from him and the book isn’t much help either. can anyone please explain the pH and pOH scales and formulas? i desperately need help. thanks

This open post was written 8 months ago | V/U/S: 348, 9, 4 | Edit Post | Leave a reply | Report Post

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LamaNick 15 #
An Unknown Location | 8 months ago (3 minutes after post)

The PH scale is how acidic and alkaline something is. 0 is neutral. Below 7 is acidic, above is alkaline. That’s about all I know though. Sorry.

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Anonymous #
8 months ago (5 minutes after post)

NeonBallerina#1 wrote:
The PH scale is how acidic and alkaline something is. 0 is neutral. Below 7 is acidic, above is alkaline. That’s about all I know though. Sorry.

…0 is neutral. Below 7 is acidic, above is alkaline. 7 is neutral

LamaNick 15 #
An Unknown Location | 8 months ago (7 minutes after post)

Sorry! That’s what I meant!

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Daksha Cromwell 1 #
An Unknown Location | 8 months ago (13 minutes after post)

yeah i know the basics of the pH scale. what i meant was how to find the [H+] and [OH-] when you are given the pH. the formula is something like pH=-log[H+] and [H+]=10^-pH and [H+]*[OH-]= 1*10^-14. im so confused with this because my teacher doesn’t really explain things in depth.

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LamaNick 15 #
An Unknown Location | 8 months ago (15 minutes after post)

Yeah. I haven’t done that yet. Sorry. I’m kind of crap at chem.

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Daksha Cromwell invited 2 users to read this post 8 months ago.

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jacobingram 3 #
An Unknown Location | 8 months ago (23 minutes after post)

ok for example lets say the question asks for how much water is needed to dilute NH4 to .18 mols if u have like 30 ml of H20 and u hav 2.0 m of Nh4, your suppose to do something like divide 2.0 m by the 30 ml which would give you .066 mols and to find how much water you’ll need you must find how much water you’ll need to get that .066 up to a .18

something like that, not too clear i know, hopefully someone can pick up where i left off and correct any mistakes

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jacobingram 3 #
An Unknown Location | 8 months ago (26 minutes after post)

the units are probably wrong and i probably have the method all messed up haha either way i hope someone understands wat i’m getting at

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yolandanunez4 #
An Unknown Location | 2 months, 1 week ago (5 months, 3 weeks after post)

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i need help with chemistry. - Help.com