Units?

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Jaifreen_Bhangu_3K
Posts: 34
Joined: Fri Sep 28, 2018 12:26 am

Units?

Postby Jaifreen_Bhangu_3K » Thu Oct 11, 2018 9:48 am

After calculating volume in a molarity problem, should the answer be in L or mL?

Jane Burgan 1C
Posts: 73
Joined: Fri Sep 28, 2018 12:15 am

Re: Units?

Postby Jane Burgan 1C » Thu Oct 11, 2018 9:52 am

It depends on the information given in the question. If the original or diluted solution volume is given in mL, then use mL. But, if it's given in L use L. Usually though they'll specify and if not, you can use L!

Jaifreen_Bhangu_3K
Posts: 34
Joined: Fri Sep 28, 2018 12:26 am

Re: Units?

Postby Jaifreen_Bhangu_3K » Thu Oct 11, 2018 9:57 am

Thank you so much!

pamcoronel1H
Posts: 45
Joined: Fri Sep 28, 2018 12:25 am

Re: Units?

Postby pamcoronel1H » Thu Oct 11, 2018 10:05 am

I think it's best to always convert to L first , since the units for molarity is always mol·L^-1.

Austin Clack
Posts: 29
Joined: Fri Sep 28, 2018 12:17 am

Re: Units?

Postby Austin Clack » Fri Oct 12, 2018 3:36 pm

whenever you're dealing with molarity, like others have said, you must use liters as your standard units. While oftentimes questions may be phrased with mL instead, always convert. Technically you can do this conversion once you've finished all your calculations, but I think its best to always convert first, just so you're able to reference your work and check to make sure your solution makes sense.

Yixiao Hu 3C
Posts: 45
Joined: Fri Sep 28, 2018 12:19 am

Re: Units?

Postby Yixiao Hu 3C » Sat Oct 13, 2018 3:07 pm

It depends on the question. But usually ,when we say molarity, it should be L for 1 molarity= 1mol/l

Alan Chang
Posts: 33
Joined: Fri Sep 28, 2018 12:29 am

Re: Units?

Postby Alan Chang » Sat Oct 13, 2018 3:54 pm

Just remember that molarity (M) is always 1 mole/Liter or 1 mole/1000 ml. If you keep this in mind you should be good to go no matter what units you are dealing with or end up with.

inlovewithchemistry
Posts: 104
Joined: Fri Sep 28, 2018 12:19 am

Re: Units?

Postby inlovewithchemistry » Mon Oct 15, 2018 11:41 am

I've found that it depends on both the question and the units that were given in the question. Whether your answer is in liters or mL doesn't matter as long as it isn't specified in the question. I like to stick to liters, as the units for molarity are mol/L.

isarose0
Posts: 62
Joined: Fri Sep 28, 2018 12:15 am

Re: Units?

Postby isarose0 » Mon Oct 15, 2018 11:42 am

The ending value of volume should be in Liters because Molarity is calculated in moles per liter


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