1. A sample of feldspar weighing 1.500g is decomposed, and eventually there is obtained a mixture ofKCI and NaCi weighing 0.1801 g. These chlorides are dissolved in H20, a 50-mL pipetful of 0.08333 NAGNO3 is added, and the precipitate is filtered off. The filtrate requires 16.47 mL of 0.100ON KCNS,with ferric alum as indicator. Calculate the percentage of K20 in the silicate.

Amount of feldspar = 1.500 g Mixture of NaCl and KCl = 0.1801 g Concentration of AgNO3 =0.08333 N…

- A sample of feldspar weighing 1.500g is decomposed, and eventually there is obtained a mixture of KCI and NaCl weighing 0.1801 g. These chlorides are dissolved in H,0, a 50-mL pipetful of 0.08333 N. AGNO3 is added, and the precipitate is filtered off. The filtrate requires 16.47 mL of 0.100OON KCNS, with ferric alum as indicator. Calculate the percentage of K20 in the silicate.

- A sample of feldspar weighing 1.500g is decomposed, and eventually there is obtained a mixture of KCI and NaCl weighing 0.1801 g. These chlorides are dissolved in H,0, a 50-mL pipetful of 0.08333 N. AGNO3 is added, and the precipitate is filtered off. The filtrate requires 16.47 mL of 0.100OON KCNS, with ferric alum as indicator. Calculate the percentage of K20 in the silicate.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter26: Molecular Absorption Spectrometry

Section: Chapter Questions

Problem 26.15QAP

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Question

1. A sample of feldspar weighing 1.500g is decomposed, and eventually there is obtained a mixture of
KCI and NaCi weighing 0.1801 g. These chlorides are dissolved in H20, a 50-mL pipetful of 0.08333 N
AGNO3 is added, and the precipitate is filtered off. The filtrate requires 16.47 mL of 0.100ON KCNS,
with ferric alum as indicator. Calculate the percentage of K20 in the silicate.

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