Arsenic equivalent weights

It is evident from the above equations that 4 equivalents of ceric sulphate is required to oxidise 1 mole of arsenic trioxide, hence, 1 equivalent weight of arsenic trioxide is 1/4 mole or 197.84/4 or 49.46 g and 1 milliequivalent shall contain 49.46 mg or 0.04946 g. 

Calculation. It is evident from the equation given above that if the weight of arsenic(III) oxide is divided by the number of millilitres of potassium permanganate solution to which it is equivalent, as found by titration, we have the weight of primary standard equivalent to 1 mL of the permanganate solution. 

Lethal dose of 923-2770 mg equivalent to about 34 mg/kg BW liver residues of 40 mg/kg fresh weight 23 deer killed from apparent misuse. Arsenic levels, in mg/kg fresh weight, in deer found dead were 19 in liver, 18 in kidney, and 22.5 in rumen. Soils from area contained 2.4 mg As/kg, and water 0.42 mg As/L... 

The loss in weight is dependent upon the quality of the arsenic oxide and glycerol used. If these are dry, the weight loss should be as indicated. The lower figure is equivalent to 1 mole of water for each mole of glycerol. 

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