Question

Which chemical can be used for preparation of buffer borax?

Answer 1

The preparation of meter calibration standards pH 4, pH 7, and pH buffer ... Sodium tetraborate/ Sodium hydroxide, 9.3 - 10.7 .... "Practical chemistry" J. Lambert and T.A. Muir, 3rd.

Answer 2

Explanation:

Ammonia Buffer pH 10.0: Dissolve 5.4 g of ammonium chloride in 20 ml of water, add 35 ml of 10 M ammonia and dilute with water to 100 ml. Ammonia Buffer pH 10.9: Dissolve 67.5 g of ammonium chloride in sufficient 10 M ammonia to produce 1000 ml.