Reagent required for determination of hardness of water. , Chemistry

Q. Name of the reagent required for determination of hardness of water sample of complex metric method. Briefly give the function of each reagent used.

Ans. Reagents required for determination of hardness of water sample by complex metric method:

(1)         Standard water sample: To determine the strength of unknown EDTA solution.

(2)         EDTA solution: It is a strong complexing agent. It acts as a tetra dentate or hexa dentate legend and binds with metal ions to give colourless and very stable chelate.

(3)         Buffer solution of pH-10: It is prepared by mixing 67.5 ml of NH4Cl and 570 ml of concentrated ammonia and make up to one Litre with distilled water. It maintains the pH-10 Erichrome black-T work at pH-10.

Indicator solution (Erichrome black-T): It has two ionisable phenol hydrogen atoms. It gives wine red coloured unstable complex with Ca+2 and Mg+2 ions of hard water. 

 

Posted Date: 7/21/2012 7:15:10 AM | Location : United States







Related Discussions:- Reagent required for determination of hardness of water. , Assignment Help, Ask Question on Reagent required for determination of hardness of water. , Get Answer, Expert's Help, Reagent required for determination of hardness of water. Discussions

Write discussion on Reagent required for determination of hardness of water.
Your posts are moderated
Related Questions
Physical Properties of Benzoic Acid (a) Benzoic Acid is a white crystalline solid. (b) Benzoic Acid has m.p. 394 K. (c) Benzoic Acid is sparingly soluble in cold water bu

how to write a lab report

chemical reaction of lactic acid

The number of electrons which can be accommodated in an orbital is: (1) One        (2) Two            (3) Three              (4) Four Ans: Two

how we can understand a katod in solution

Azimuthal quantum number defines: (1) e/m ratio of electron (2) Spin of electron (3) Angular momentum of electron (4) Magnetic momentum of electron Ans:  Angular mo


Uses of Alkenes (i) Alkenes are used for the manufacture of polythene - a plastic material;  (ii) Alkenes are used for artificial ripening of fruits; (iii) Alkenes are us


Separation methods: The present unit gives an introduction to the course on separation methods. It highlights the utility of separations within the analysis and recovery of pu