6.2 - Effect of Concentration on Reaction Rate using Sodium Thiosulphate and Hydrochloric Acid (Leaving Cert Chemistry): Flashcards
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Practise the cards
13 cards from this deck
What this expt investigates (Na₂S₂O₃ + HCl)
What this expt investigates (Na₂S₂O₃ + HCl)
Effect of [Na₂S₂O₃] on reaction rate
How rate measured in this expt
How rate measured in this expt
Time for S precipitate to obscure cross
Role of S in reaction
Role of S in reaction
Forms cloudy precipitate that obscures cross
Conc. of Na₂S₂O₃ solution used
Conc. of Na₂S₂O₃ solution used
0.1 M
Conc. of HCl used
Conc. of HCl used
3 M
Initial vol. of Na₂S₂O₃
Initial vol. of Na₂S₂O₃
100 cm³
Vol. of HCl added
Vol. of HCl added
10 cm³
Eye protection required
Eye protection required
Safety glasses
Hazard property of HCl
Hazard property of HCl
Corrosive
Why ventilation needed
Why ventilation needed
SO₂ gas produced during reaction
Formula to calculate rate
Formula to calculate rate
(reciprocal of time)
Effect of ↑[Na₂S₂O₃] on reaction time
Effect of ↑[Na₂S₂O₃] on reaction time
Decreases (cross disappears faster)
Effect of ↑[Na₂S₂O₃] on rate
Effect of ↑[Na₂S₂O₃] on rate
Increases