182 



Chart A 15. — Potassium-sulphide Reactions. 



Chart A 16. — Sodium-hydroxide Reactions. 







33: 



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gal mis ^% 



PUk* oSo oSq 



ggs gsg ggg ^„ 



ggl lgl III ll 



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B- 

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15- 



40 - 

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 S6 - 

 100 - 

 90 - 

 60- 

 70 . 



eo . 

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40 - 



ao - 



20 ■ 



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ill giii Ss|i ill ^ss gil Igi III ^|E lit <: 

 s§s mil sill lis ||s isi M III M III U 



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MM HMM 



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m 



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35 



1 



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 1|g III 



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II 



ill 



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