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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.
Calculate the pH of 0.100 L of a buffer solution that is 0.22M in HF and 0.53M in NaF
An aqueous solution has a hydroxyl concentration of 1.75 x 10^-7mol/L. Find the concentration of hydrogen ions in this solution.
scientist''s explain about atomic
why isoquinoline is weak base as compare to quinoline?#
what are the value of standard oxidation and standaed reduction potential of water
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Write the maximum possible coordination number of an atom in an hcp crystal structure of an element? Illustrate the formula relating pressure of a gas with its mole fraction in
The phosphate of a metal has the formula MPO4 .The formula of its nitrate will be: (1) MNO 3 (2) M 2 (NO 3 ) 2
type of electrode?
Q. Distribution coefficients of the salts? The distribution coefficients of the salts of lanthanide elements between organic and water solvents are slightly different. Thus, th
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