Molarity formulas

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Ivan_Tang_2G
Posts: 105
Joined: Fri Sep 24, 2021 6:40 am

Molarity formulas

Postby Ivan_Tang_2G » Thu Dec 02, 2021 10:15 pm

can someone remind me what the molarity equations are? I remember that there was more than one, and I can only remember the M1V1=M2V2 formula. Is there more?

Hayden Jackson
Posts: 100
Joined: Fri Sep 24, 2021 6:26 am

Re: Molarity formulas

Postby Hayden Jackson » Thu Dec 02, 2021 10:20 pm

The formula for molarity is moles of solute divided by liters of the solvent. The M1V1=M2V2 formula is for dilution problems and then another equation which can be acquired from rearranging the molarity formula is molarity x volume = # of moles. Hope this helps!

Wilson Zheng 1L
Posts: 116
Joined: Fri Sep 24, 2021 6:29 am

Re: Molarity formulas

Postby Wilson Zheng 1L » Thu Dec 02, 2021 10:29 pm

Theres M = n/V and M1V1 = M2v2 I believe!

Kirsten Yu 2K
Posts: 82
Joined: Fri Sep 24, 2021 5:10 am

Re: Molarity formulas

Postby Kirsten Yu 2K » Thu Dec 02, 2021 11:05 pm

Hi! In addition to M1V1 = M2V2, there's also m = n/v
m= molar concentration
n= moles of solute
v= liters of solution

Sonia Virk 2A
Posts: 51
Joined: Fri Sep 24, 2021 5:13 am

Re: Molarity formulas

Postby Sonia Virk 2A » Sat Dec 04, 2021 9:14 pm

Hi, yes the molarity is the concentration of a substance in a solution and the equation for molarity is M= n moles of solute/Volume of solution in L. Hope this helps!

PatrickV
Posts: 100
Joined: Fri Sep 24, 2021 5:48 am

Re: Molarity formulas

Postby PatrickV » Sat Dec 04, 2021 10:40 pm

There are only 2 you need to know. There is the one you said M1V1=M2V2 which is used in dilution problems. The other formula is the one for molarity which is M=n/v (n= number of moles, v=volume in liters).

505784197
Posts: 101
Joined: Fri Sep 24, 2021 7:09 am

Re: Molarity formulas

Postby 505784197 » Sat Dec 04, 2021 10:42 pm

This stems from Molarity is equal to moles (n) over Volume (L). The amount of moles in a solution is always the same no matter the amount of solution. That is where you get your equation from.

Ryan Lafferty 1L
Posts: 61
Joined: Fri Sep 24, 2021 5:51 am

Re: Molarity formulas

Postby Ryan Lafferty 1L » Sun Dec 05, 2021 10:09 pm

M= n/v and M1V1=M2V2


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