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I need help again :(
Posted: Fri Sep 07, 2018 8:08 am
by davidwiki8
Do you know how orthoclase and biotite will react when the get in contact with sulfuric or nitric acid? Their formulas are:
KAlSi3O8
K(Mg,Fe)3AlSi3O10(OH,F)2
I know it's something strange but I really need help with this.
Posted: Fri Sep 07, 2018 8:26 am
by ChenBeier
Beside silicon all other ions can be washed out like in the other example.
Posted: Fri Sep 07, 2018 8:29 am
by davidwiki8
And could you tell me more less how the reaction adjustment would be?
Posted: Fri Sep 07, 2018 8:54 am
by ChenBeier
Code: Select all
KAlSi3O8 + 4 H+ => K+ + Al³+ + 3 SiO2 + 2 H2O
Code: Select all
K(Mg,Fe)3AlSi3O10(OH,F)2 + 10 H+ => K+ +3 (Mg²+,Fe²+) + Al³+ + 3 SiO2 + 5( 6) H2O + 2( 0)HF
in case of Flouride
Posted: Fri Sep 07, 2018 9:21 am
by davidwiki8
Thank you so much again!
<3
Posted: Fri Sep 07, 2018 9:28 am
by davidwiki8
And why are the 6 and 0 between parenthesis?
Posted: Fri Sep 07, 2018 9:31 am
by ChenBeier
If flouride is present then you get 5 water and 2 hydrogenflouride
if it is absent then you get only 6 water.
Posted: Fri Sep 07, 2018 9:38 am
by davidwiki8
Oh, so the parethensis in the reagents means that they might be present or not?
Posted: Fri Sep 07, 2018 9:41 am
by ChenBeier
Yes, in brackets you can have OH or F not both in same time. The same for Mg and Fe. At least there can be 4 different minerals.