Tungsten trioxide (wo3) has a rich yellow color and is often used as a pigment in ceramics and paints. in order to test a ceramic vase for its wo3 content, a 10.22 g sample of the vase was ground and reduced with pb(hg) to convert any wo3 to w3 . the resulting w3 was transferred to 500.0 ml of 1.00 m hcl. a 100.00 ml aliquot of the hcl solution required 14.66 ml of 0.08808 m potassium permanganate (kmno4) to reach the purple endpoint. a blank required 0.26 ml. balance the reaction below and determine the percent wo3 in the ceramic sample. mno4 + w + h > mn + wo2 + h2o