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Tungsten trioxide (WO3) has a rich yellow color and is often used as a pigment in...

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Chemistry

Tungsten trioxide (WO3) has a rich yellow color and is oftenused as a pigment in ceramics and paints. In order to test aceramic vase for its WO3 content, a 10.05 g sample of the vase wasground and reduced with Pb(Hg) to convert any WO3 to W3 . Theresulting W3 was transferred to 500.0 mL of 1.00 M HCl. A 100.00 mLaliquot of the HCl solution required 13.50 mL of 0.08202 Mpotassium permanganate (KMnO4) to reach the purple endpoint. Ablank required 0.06 mL. Balance the reaction below anddetermine the percent WO3 in the ceramic sample.

Answer & Explanation Solved by verified expert
4.3 Ratings (566 Votes)
The reaction to be occured when W3 reacts with KMnO4 5 W3 5 W6 15 e 3 MnO4 15 e 24 H 3 Mn2 12 H2O Let us calculate the moles of MnO4 Volume of    See Answer
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