Advanced Higher Chemistry 2018-19 Watch

A_Ch
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#41
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#41
Can somone help me with this question? I thought it was A but its actually B.
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hydroxide
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#42
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#42
(Original post by A_Ch)
Can somone help me with this question? I thought it was A but its actually B.
n=cv
n=2 x 0.05L
n=0.1 mol

to find the diluted concentration you have to add the volumes together
c=n/v
c=0.1mol / (0.05+0.2)
c= 0.4 mol l-1
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A_Ch
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#43
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#43
Thank you
(Original post by hydroxide)
n=cv
n=2 x 0.05L
n=0.1 mol

to find the diluted concentration you have to add the volumes together
c=n/v
c=0.1mol / (0.05+0.2)
c= 0.4 mol l-1
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Mhussain01
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#44
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#44
Hi guys wondering if someone could help me regarding the project:

So for my project I’ve done, investigations the mass of oxalis acid in spinach leave through the use of volumetric analysis. And for my method I kind of made it up with the information I researched online and discussing with my chemistry teacher. And apparently we need to have a reference for the method but I’ve just put acknowledgements in, is that enough or will I be penalised?
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Labrador99
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#45
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#45
(Original post by Mhussain01)
Hi guys wondering if someone could help me regarding the project:

So for my project I’ve done, investigations the mass of oxalis acid in spinach leave through the use of volumetric analysis. And for my method I kind of made it up with the information I researched online and discussing with my chemistry teacher. And apparently we need to have a reference for the method but I’ve just put acknowledgements in, is that enough or will I be penalised?
You don't need to reference an exact method, but you should be referencing all the sources you used for the project.
Acknowledgements don't gain or lose you any marks, but it's still good to include.

There isn't a mark awarded specifically for references in the methods section.
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Mhussain01
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#46
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#46
Okay thank you! I’ve referenced all other sources used and hopefully that all be sufficient.
(Original post by Labrador99)
You don't need to reference an exact method, but you should be referencing all the sources you used for the project.
Acknowledgements don't gain or lose you any marks, but it's still good to include.

There isn't a mark awarded specifically for references in the methods section.
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Labrador99
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#47
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#47
(Original post by Mhussain01)
Okay thank you! I’ve referenced all other sources used and hopefully that all be sufficient.
Sounds like that will be fine
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Mhussain01
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#48
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#48
Cheers
Also another quick question, do we reference images and diagrams as well?
(Original post by Labrador99)
Sounds like that will be fine
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MadsClare_13
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#49
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#49
(Original post by Mhussain01)
Cheers
Also another quick question, do we reference images and diagrams as well?
Yep! If in doubt, reference
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Labrador99
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#50
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#50
(Original post by Mhussain01)
Cheers
Also another quick question, do we reference images and diagrams as well?
Yep!
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A_Ch
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#51
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#51
Can someone explain this question please?
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_nim1
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#52
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#52
(Original post by A_Ch)
Can someone explain this question please?
It’s an emission spectrum.
Electrons absorb energy and become excited, moving to higher energy levels. Then they fall back down and emit energy corresponding to yellow light.
Sodium has a wavelength of 589nm according to the data booklet which corresponds to yellow light.
I think..
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