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davidwiki8
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I need help again :(


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.
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ChenBeier
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Beside silicon all other ions can be washed out like in the other example.
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davidwiki8
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And could you tell me more less how the reaction adjustment would be?
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ChenBeier
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KAlSi3O8 + 4 H+ => K+ + Al³+ + 3 SiO2 + 2 H2O

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

SiO2 + 4 HF => SiF4 + 2 H2O
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davidwiki8
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Thank you so much again!

<3
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davidwiki8
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And why are the 6 and 0 between parenthesis?
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ChenBeier
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If flouride is present then you get 5 water and 2 hydrogenflouride
if it is absent then you get only 6 water.
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davidwiki8
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Oh, so the parethensis in the reagents means that they might be present or not?
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ChenBeier
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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.
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