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SMITH'S INTERMEDIATE CHEMISTRY 



Exercises. 1. Mark the valences in the formulae: 

 V 2 5 , Os0 4 , PtCl 4 . 



2. Mark the valences of the radicals in the formulae: Zn(Se0 4 ), 

 Al 2 (Te0 4 ) 3 , H 3 (As0 4 ), H(SbO 3 ). 



3. If 26 g. of chromium displace 1 g. of hydrogen from hydro- 

 chloric acid, what is the valence of chromium in this displacement 

 (see Table of Atomic Weights)? 



4. Correct the following formulae: CaNO 3 , CaP0 4 , A1(P0 4 ) 2 , 

 LiO, PbF, Bi(N0 3 ) 2 . 



5. One gram of a quadrivalent element unites with 0.27 g. 

 of oxygen. What is the atomic weight of the element? 



