Sentence Examples


  • It combines directly with ammonia to form the compound SiF 4 2NH,, and is absorbed by dry boric acid and by many metallic oxides.
  • Whilst with sodium hydroxide, sodium fluoride is produced: 3SiF4= 4KHO = S102+ 2K 2 SiF 6 + 2H 2 0; SiF 4 + 4NaOH = SiO 2 + 4NaF+ 2H 2 O.
  • It is decomposed readily by water, sodium hydroxide, alcohol and ether: 2SiHF 3 +4H 2 0 = H 4 S10 4 +H 2 SiF 6 -1-211 2; SiHF 3 +3NaOH H 2 O =H4S104+3NaF+H2; 2SiHF 3 +4C 2 H 5 OH =Si(0C 2 H 5) 4 +H 2 SiF 6 +2H 2 i SiHF 3 +3(C 2 H 5) 2 0 =SiH(OC2H5)3+3C2H5F.
  • The solution on evaporation deposits a hydrated form, H 2 SiF 6.2H 2 O, which decomposes when heated.
 
 

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