Question

What is the role of NH3/NH4Cl buffer in the determination of hardness of water sample?

Answer 1

Ammoniacal Buffer (NH3 or NH4Cl) helps to determine the hardness of water

Explanation:

• When we dissolve 90 gram of water and almost 20 to 30 % of ammonium hydroxide, the Ph of water reaches up to 10
• This will e sufficient for almost 120 titrations
• This method can also be used for the determination of metal ions in the hard water and help to remove them

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