Question:- Find the empirical formula of the compound with the following percentage composition: \(Pb= 62.5\%\); \(N=8.5\%\); \(O=29.0\%\)
- August 25, 2023
- Posted by: Nirgaman
- Category: Chemistry ICSE Grade-10
Solution:- Atomic masses of \(Pb= 207~amu\), \(N= 14~amu\), \(O=16~amu\)
We will have compound formation, that will contain three elements \(Pb\), \(N\) and \(O\)
Elements Percentage\(\%\) No. of Moles Simplest Whole Number Ratio
\(Pb\) 62.5 \(\frac{62.5}{207}= 0.319\) \(\frac{0.319}{0.319}=1\)
\(N\) 8.5 \(\frac{8.5}{14}=0.6\) \(\frac{0.607}{0.319}=2\)
\(O\) 29 \(\frac{29}{16}=1.816\) \(\frac{1.816}{0.319}=6\)
Therefore the empirical formula = \(PbN_{2}O_{6}\)
= \(Pb(NO_{3})_{2}\)