Question

A sample of pure lead weights 2.07 gm dissolves in nitric acid to give a solution of lead nitrate.the soln is treated with HCl,cl2,NH4CL,.The result in the precipitation of (NH4)2pbcl6.what was the maxm wt of this product that could be obtained from lead sample?

Answer 1

Answer:

95.14%

Explanation:

First use PV=nRT and find no. of moles of hydrogen since all are given in question

then find mole ratio i.e Al/H2=1/3/2... find no . of moles of al from these

after finding no. of moles multiply it by 27 for finding weight of Al

and find % of Al in alloy by = wt of al/wt of original Al *100%.........

cheers man!!!