Question

Potassium manganate is a dark green crystalline substance whose composition is-39.7%K ,29.9% Mn, and rest oxygen..Find the empirical formula.[K=39.1, O=16, Mn= 54.93]
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Answer 1

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11th

Chemistry

Organic Chemistry - Some Basic Principles and Techniques

Qualitative Analysis of Organic Compounds

Potassium magnate is a dark...

CHEMISTRY

Potassium magnate is a dark green crystalline substance whose composition is 40.2% K, 26.8% Mn and rest P. What is empirical formula?

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ANSWER

%K=40.2%Mn=26.8%O=33

Consider a 100 g sample

Moles of K=39×100100×40.2=1.03

Moles of Mn=55×100100×26.8=0.5 

Moles of O=16×100100×33=2.06 

Formula ⇒K1Mn0.5O2⇒K2MnO4 (Empirical Formula