Rate of Reaction Experiments Flashcards
How would one carry out measuring the rate of reaction between HCl and Marble Chips?
This experiment is done to demonstrate how breaking the solid (marble) into chips quickens the rate of reaction.
You measure the volume of Carbon-Dioxide given off and take readings at regular time intervals.
Plot a graph for the rate of reaction (time against gas volume). Time goes on x-axis & gas volume of y axis.
Repeat the experiment several times, using the same concentration of acid but using marble chips that get progressively more broken up.
Then use powdered chalk. At the end, compare the results.
How would one carry out measuring the rate of reaction between magnesium metal and dilute acid?
This reaction is good for seeing how the concentration of an acid affects the rate of reaction.
Plonk a set amount of magnesium into a set amount of acid. This reaction gives off hydrogen gas, which means we can measure the change in mass using a mass balance.
Repeat the experiment several times using different concentrations of acid then plot them on a rate of reaction graph.
ONLY CONCENTRATION OF ACID IS CHANGED.
KEEP VOLUME OF ACID & AMOUNT OF SOLID THE SAME.
How would one carry out measuring the rate of reaction between Sodium Thiosulfate and HCl?
The reaction between sodium thiosulfate and hydrochloric acid produces a cloudy precipitate.
They react together to form a yellow precipitate of sulfur.
You add the reactants together and measure how long it takes for a black mark underneath the beaker to disappear.
You can repeat the reaction at different temperatures to see how the rate of reaction is affected.
Heat the acid in a water bath before mixing it with the sodium thiosulfate #SafetyFirst, never directly heat an acid.
How would one carry out measuring the rate of reaction of the decomposition of Hydrogen Peroxide?
This reaction, given that its a decomposition reaction, means that it’s perfect for measuring the effect that catalysts have on the rate of reaction.
Without a catalyst, the reaction is slow, but with the addition of manganese(IV) oxide catalyst, it speeds RIGHT UP.
Oxygen is given off, so you can use a gas syringe to collect that.
