Snehsis Panda posted an Question
December 12, 2021 • 12:45 pm 20 points
  • IIT JAM
  • Geology (GG)

The mole percentage of si02, al203 and k20 in a granitic rock are 84.21, 7.89 and 7.89 respectively. the molar proportion (in %) of k-feldspar in the rock is...

The mole percentage of Si02, Al203 and K20 in a granitic rock are 84.21, 7.89 and 7.89 respectively. The molar proportion (in %) of K-feldspar in the rock IS... ** ... ?

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    Sushmita

    Dear Amy... Here, we subtract 6 moles of SiO2 (6×7.89%=47.34%), because this quartz amount is use for formation of potash feldspar (K-feldspar), so we need to subtract this amount from total quartz amount for finding the mole % of quartz in granite.

  • Amy

    sir why do we subtract 6moles of 7.89 mole % from the given sio2 mole %?

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