Lead is a highly poisonous metal. The mass percentage of lead in the 250 g
aqueous solution was found to be 1.2×10
−6%
by extracting the lead with an excess of iodide and weighing the resulting
. How many micrograms (μg) of lead iodide were measured?
Mass percentage of %
100 g of solution contains 1.2×10-6 g of Pb
250 g of solution contains 1.2×10-6 ×250/100 g of
No of moles of
Mass of
of lead iodide
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