GRAVIMETRIC FACTORS 



A gravimetric factor is a stoichiometric ratio between the weights of 

 two substances. In tlie case of Table A, it is the ratio of the molecular 

 weights of the hydrated/anhydrous salts. To obtain the weight of hydrate 

 equivalent to a given- amount of anhydrous salt, multiply the weight of 

 anhydrous salt by the factor. In the case of Table B, the factor is the 

 ratio of equivalent weights as shown in the formula fraction. To obtain 

 tlie weight of substance in the numerator equivalent to a known weight of 

 substance in the denominator, multiply the latter weight by the factor. 

 TABLE A: Hydrated : Anhydrous Salts 



Factor 



1.095 



1.401 



1.145 



1.974 



1.325 



1.440 



1.141 



1.264 



1.268 



1.287 



1.564 



1.100 



1.667 



1.568 



1.165 



1.164 



1.587 



2.135 



2.048 



1.572 



1.477 



1.119 



1.147 



1.659 



1.170 



1.486 



1. 140 



1. 176 



1.150 



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