Chemistry

Problem

In an ore, the only oxidizable material is

\text{Sn}^{2+}

. This ore is titrated with a dichromate solution containing 2.5 g of

\text{K}_2\text{Cr}_2\text{O}_7

in 0.5 litre. A 0.40 g sample of the ore required

10.0\ \text{cm}^3

of titrant to reach equivalence point. Calculate the percentage of tin in ore. (Roorkhee 1993)