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Paragraph 4 REAGENTS

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Diluted hydrochloric acid:

4.1

One volume of hydrochloric acid (ρ = 1.18 g/ml) plus one volume of water.

4.2

Aluminium nitrate Al(NO3)3. 9H2O.

4.3

Caesium chloride, CsCl.

4.4

Anhydrous sodium chloride, NaCl.

Caesium chloride and aluminium nitrate solution

4.5

Dissolve in water 50 g of caesium chloride (4.3) and 250 g of aluminium nitrate (4.2) in a 1 litre graduated flask. Make up to volume with water and mix.

Standard sodium solution of 1 mg/ml of Na

4.6

Dissolve in water 2.542 g of sodium chloride (4.4) in a 1 litre graduated flask. Add 10 ml of hydrochloric acid (4.1). Make up to volume with water and mix.