Flashcards
reactions of halide ions with concentrated sulfuric acid
Flashcards do conjunto (7)
- 1Reaction of NaF with concentrated sulfuric acid (H2SO4)- NaF(s)+H2SO4(aq) --> NaHSO4(s) +HF(g)
- Misty fumes as gas comes into contact with moisture in air
-HF not strong enough reducing agents to reduce sulfuric acid so not a redox - 2Reaction of NaCl with concentrated sulfuric acid (H2SO4)- NaCl(s)+H2SO4(aq) --> NaHSO4(s) +HCl(g)
- Misty fumes as gas comes into contact with moisture in air
-HCl not strong enough reducing agents to reduce sulfuric acid so not a redox - 3First reaction with NaBr and concentrated sulfuric acid (H2SO4)NaBr(s) + H2So4(aq) --> NaHSO4(s) +HBr (g)
- misty fumes of hydrogen bromide seen - 4Second (redox) reaction that occurs when NaBr is reacted with concentrated sulfuric acid (H2SO4)HBr is a stroger reducing agent than HCl so can react with H2SO4 in redox reaction:
2HBr(aq) + H2SO4(aq) --> Br2(g) + SO2(g) + 2H2O (l)
- sulfur goes from ox. state of +6 to +4
- Br goes from ox. state of -1 to 0
- choking fumes of SO4
-Orange Br2 fumes - 5First reaction of NaI with concentrated sulfuric acid (H2SO4)NaI(s) + H2SO4(s) --> NaHSO4(s) + HI (g)
- 6Redox reaction that occurs in the inital reaction of NaI and concentrated sulfuric acid (H2SO4)2HI(g) + H2SO(aq) --> I2(s) + SO2(g) + 2H2O(l)
-sulfur ox. state +6 to +4
-Iodine ox. state -1 to 0
-reaction occurs because HI produced in initial reaction reduces H2SO4 - 7Second redox reaction between NaI and H2SO46HI(g)+SO2(g) --> H2S(g) +3I2(s)+2H2O(l)
- HI keeps reducing So2 and H2S
- Sulfuer ox. state +4 to -2
-I ox. state from -1 to 0
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- FlashCards sobre reactions of halide ions with concentrated sulfuric acid, criado por kep1001 em 04-05-2014.
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