RP7 measuring rate of a reaction Flashcards
1
Q
What is meant by rate of a reaction
A
Change in conc of reactants or products over time
2
Q
Example of a continous monitoring method
A
Add 6cm magnesium ribbon to flask contain HCl place a bung in top and start timer
Note down vol of hydrogen gas collected every 15 secs for 2.5 mins
Repeat for diff HCl concs
3
Q
Some issues with gas volume measuring
A
Some gas may escape before bung is added
Magnesium strips may be of different mass and surface area, will affect rate
4
Q
How to prevent gas escaping
A
Place solid reactant upright in tube in flask, tip the tube over by moving the conical flask around to start reaction
5
Q
A
