Free books for all

Dear All,
In need of any book(.pdf) relating to any subject/field or topic?
go to your browser and type:
www.pdfdrive.net
and u will get access to millions of  books u need for free.
Unlimited downloads.

You may browse by title or author, etc.
Currently 274376478 books are available for free and every minutes around 50 new books are added to the database.
All downloads are free😊.
Forward to all.

Thanks,

Sharing is caring!!

Comments

Post a Comment

Popular posts from this blog

Estimation of Nitrogen BY Kjeldahl Method

Image
The  Kjeldahl method  in  analytical chemistry  is a method for the quantitative determination of  nitrogen  contained in  organic substances  plus the nitrogen in inorganic ammonia and ammonium (NH 3 /NH 4 + ). Other forms of inorganic nitrogen, for instance  nitrate , are not included in this measurement. This method was developed by  Johan Kjeldahl  in 1883 The method consists of heating a substance with  sulphuric acid , which decomposes the organic substance by oxidation to liberate the reduced nitrogen as  ammonium sulphate . In this step  potassium sulphate  is added to increase the  boiling point  of the medium (from 337 °C to 373 °C) .  Chemical decomposition  of the sample is complete when the initially very dark-coloured medium has become clear and colourless. The solution is then distilled with a small quantity of sodium hydroxide, which converts the ammonium s...
Read more