Paper 2: Required Practicals Flashcards
(12 cards)
What is the aim of the electrolysis practical?
To investigate the process of electrolysis of water or an electrolyte.
What is the method for the electrolysis practical?
Use a power supply and electrodes to electrolyze water or salt solutions, observing gas production at the anode and cathode.
What is the expected result of the electrolysis practical?
At the cathode, hydrogen gas is produced, and at the anode, oxygen gas is produced (in the case of water).
What is the aim of the rate of reaction practical?
To investigate how surface area affects the rate of a chemical reaction.
What is the method for the rate of reaction practical?
React a solid (e.g., marble chips) with acid and measure how the rate changes as the surface area is varied.
What is the expected result of the rate of reaction practical?
Smaller pieces or a powder of the solid react faster than larger chunks, increasing the surface area.
What is the aim of the titration (strong acid and weak base) practical?
To determine the concentration of a weak base using a strong acid.
What is the method for the titration (strong acid and weak base) practical?
Use a pipette to add a measured volume of the weak base, then slowly add the strong acid until neutralization occurs.
What is the indicator used in the titration (strong acid and weak base)?
Methyl orange, which changes color from yellow to red as the pH goes from alkaline to acidic.
What is the aim of the gas collection practical?
To investigate the volume of gas produced during a chemical reaction.
What is the method for the gas collection practical?
React a substance (e.g., zinc and acid) in a conical flask, and collect the gas in an upside-down measuring cylinder or gas syringe.
What is the expected result of the gas collection practical?
The volume of gas produced is directly related to the amount of reactant used and can be measured to calculate reaction rate.
