Paper 1: Required Practicals Flashcards
(18 cards)
What is the aim of the concentration and reaction rate practical?
To investigate how concentration affects the rate of reaction.
What is the method for the concentration and reaction rate practical?
React hydrochloric acid with sodium thiosulfate and measure how long it takes for the solution to turn cloudy at different concentrations.
What is the expected result for the reaction rate practical?
As the concentration of the reactants increases, the reaction rate increases (the solution turns cloudy faster).
What is the aim of the temperature and reaction rate practical?
To investigate how temperature affects the rate of reaction.
What is the method for the temperature and reaction rate practical?
Heat a solution of sodium thiosulfate and hydrochloric acid. Measure how long it takes for the solution to turn cloudy at different temperatures.
What is the expected result for the temperature and reaction rate practical?
As temperature increases, the reaction rate increases.
What is the aim of the pH and reaction rate practical?
To investigate how pH affects the rate of reaction.
What is the method for the pH and reaction rate practical?
React calcium carbonate with hydrochloric acid at different pH values and measure how long it takes for the reaction to finish.
What is the expected result for the pH and reaction rate practical?
The reaction is faster at more neutral pH levels and slower at extreme pH values.
What is the aim of the displacement reaction practical?
To investigate the reactivity of metals using a displacement reaction.
What is the method for the displacement reaction practical?
Place a more reactive metal in a solution of a less reactive metal’s salt and observe if a displacement reaction occurs.
What is the expected result for the displacement reaction practical?
The more reactive metal displaces the less reactive metal from the solution.
What is the aim of the titration practical?
To determine the concentration of an acid or base by neutralization.
What is the method for the titration practical?
Use a pipette to add a measured volume of an acid to a conical flask, then slowly add a base from a burette, using an indicator to identify the endpoint.
What is the indicator commonly used in titration?
Phenolphthalein, which turns from pink to colorless as the solution is neutralized.
What is the aim of the energy change practical?
To investigate the temperature change during a neutralization reaction.
What is the method for the energy change practical?
Mix a known volume of acid with a base and measure the temperature change using a thermometer.
What is the expected result for the energy change practical?
Exothermic reactions release heat, so the temperature increases during the neutralization process.
