Practical Flashcards
1
Q
Steps for practical
A
measure (indicated) volume of sodium thiosulfate
place sodium thiosulfate in (conical) flask
⚫ measure (indicated) volume of hydrochloric acid
connect to a gas syringe
other suitable method for timing a change ⚫ add hydrochloric acid to (conical) flask
.swirl swirl
start stopclock / stopwatch
measure time for cross to become no longer visible
repeat for different concentrations of sodium thiosulfate
or change ratio of sodium thiosulfate volume: water volume
control variables
⚫ concentration of hydrochloric acid
volume of hydrochloric acid
(total) volume of sodium thiosulfate solution
