## Molar concentration of acids & bases

Alondra
Posts: 36
Joined: Tue Feb 26, 2019 12:15 am

### Molar concentration of acids & bases

If you're asked about the molar concentration of H30+ or OH- would you leave the answer as just the concentration with units mol.L^-1 or do you have to define this concentration as logarithms (pH=-log[H30+] and pOH-log[OH-])?

Rodrigo2J
Posts: 102
Joined: Sat Jul 20, 2019 12:16 am

### Re: Molar concentration of acids & bases

if it asks for molar concentration then you just need to leave your answer in terms of molarity or (mol/L). The question should ask you for pH or pOH if they want that specific answer.

JonathanS 1H
Posts: 101
Joined: Thu Jul 11, 2019 12:17 am

### Re: Molar concentration of acids & bases

If you are asked specifically for molar concentrations, you would give the moles/Liter rather than the pH or pOH.

Christine Honda 2I
Posts: 116
Joined: Sat Sep 14, 2019 12:17 am

### Re: Molar concentration of acids & bases

If it asks for molar concentrations I believe it is asking for mol/L. pH or pOH will be asked for specifically.

TimVintsDis4L
Posts: 104
Joined: Sat Aug 17, 2019 12:17 am

### Re: Molar concentration of acids & bases

Just remember that pH = -log[H30+] and pOH= - log [OH-] so try not to get them confused. If only one is given, then subtract the pH from 14 to get the other.

Daria MacAuslan 1H
Posts: 50
Joined: Sat Aug 17, 2019 12:16 am

### Re: Molar concentration of acids & bases

If you are asked for the molar concentration, answer in mols/L, rather than pH or pOH. If you are asked for either of those, though, then you would need to take the negative log of the molar concentration and answer in that way.

Rosa Munoz 2E
Posts: 105
Joined: Wed Sep 18, 2019 12:21 am

### Re: Molar concentration of acids & bases

molar concentration deals with molarity

Posts: 104
Joined: Fri Aug 09, 2019 12:16 am

### Re: Molar concentration of acids & bases

It will ask specifically for pH or pOH if that's what they want. Otherwise, just give in the units of what they're asking for.

preyasikumar_2L
Posts: 101
Joined: Fri Aug 09, 2019 12:17 am

### Re: Molar concentration of acids & bases

If you're asked for the molar concentration of H3O+ or OH- you can leave your answer in terms of mol/L. Only when they ask for the pH or pOH do you have to think about taking the logarithms of those values.

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