quiz 2 Flashcards
Plan an investigation to find out how the concentration of an acid affects its rate of reaction with a metal.Ensure the method leads to a valid conclusion
Measure a fixed mass of metal
Use a measuring cylinder to measure a set volume of acid and pour it into a flask
Add the metal to the flask. Immediately attach a gas syringe to the flask and start a timer
Record the volume of gas in the flask at different times
Repeat with acids of different concentrations
Ensure that the following variables are kept constant: mass of metal,type of metal,particle size of metal,volume of acid,type of acid and starting temperature of acid
A student is adding metal carbonate to acid at a range of different concentrations to measure the rate of reaction.Name the variables that need to be controlled
Metal in the metal carbonate
Mass of metal carbonate
Particle size of metal carbonate
Starting temperature and type of acid
In a reaction between 2 solutions, a solid is produced.Name the experimental method that can be used to measure the rate of reaction
The disappearing cross method
A student is adding metal carbonate to acid at a range of different temperatures to measure the rate of reaction.Name the dependent variable
Change in mass or volume of gas produced at different times
A student is adding metal carbonate to acid at a range of different concentrations to measure the rate of reaction.Name the independent variable
Concentration of acid
A student has 2 solutions,A and B. When they are mixed together,a precipitate is formed.plan an investigation for how the disappearing cross method can be used to establish the effect of concentration on rate of reaction.Ensure the method leads to a valid conclusion
Use a measuring cylinder to prepare a set volume of solutions A and B
Add solution B to a flask on top of a cross
Add solution A to the flask and start a timer
Stop the timer when the cross is no longer visible
Repeat with different concentrations of solution B
Ensure that the following variables are kept constant: concentraction of solution A,starting temperatures of solutions A and B and volumes of solutions A and B
Name the piece of equipment used to measure the volume of a produced gas when establishing the rate of reaction
A gas syringe
In a reaction between a solution and a solid, a gas is produced.Explai how the rate of reaction can be established
Measure the change in mass or change in volume in a certain amount of time
