Proximate Analysis: Moisture Determination in Coal Sample
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Questions and Answers

What is the purpose of using anhydrous potassium sulphate in the Kjeldahl's method?

to raise the boiling point

What is the role of copper sulphate in the Kjeldahl's method?

catalyst

What is the indicator used to detect the presence of ammonia gas in the Kjeldahl's method?

methyl red

What is back titrated with N/10 NaOH in the Kjeldahl's method?

<p>unreacted acid</p> Signup and view all the answers

What reaction takes place between (NH4)2SO4 and NaOH in the Kjeldahl's method?

<p>Na2SO4 + NH3 + 2H2O</p> Signup and view all the answers

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