Required Practical 5 Rates Of Reaction Using Hydrogen Flashcards
(4 cards)
Equation for the reaction
Magnesium + hydrochloric acid goes to magnesium chloride + hydrogen
Importance of product hydrogen gass
It allows us to measure the volume of hydrogen gass produced
Method
Use measuring cylander to place 50cm³ of hydrochloric acid into a conical flask
Attach the conical flask to a bung and delivery tube
Place delivery tube into container filled with water
Place an upturned measuring cylander also filled with water over the delivery tube
Add a 3cm strip of magnesium to the hydrochloric acid and start stopwatch
The reaction produces hydrogen gass which is trapped in the measuring cylander
Every 10 seconds measure the volume of hydrogen gass in the measuring cylander
Continue until no more hydrogen is given off
Repeat using different concentrations of hydrochloric acid
Repeat experiment twice again and find mean volume
Both the disappearing cross experiment and hydrogen volume experiment show
That the greater the conc of a chemical in the reaction the faster the reaction takes place
Because this is shown by two different experiments we can say that the finding is reproducible
