✅16 - Kinetics II
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (24 张)
What does rate of reaction tell you?
How fast reactants are converted to products
How is rate calculated?
Change in concentration of products/time
How can rate of reaction be determined experimentally?
Gas volume Loss of mass Colour change Change in pH Titration Electrical conductivity
How can gas volume be used to determine rate of reaction?
It can be collected in a syringe and the amount recorded at set intervals, and the ideal gas equation used to work out moles and then molar ratio
How can loss of mas be used to determine rate of reaction?
If a gas is given off, the system will lose mass, measured at regular intervals with a balance
How can colour change be used to determine rate of reaction?
Can be tracked with a colorimeter and a calibration curve plotted
How can change in pH be used to determine rate fo reaction?
If a reaction produces or used up H+, pH can be measured to determine the change in H+ concentration
How can titration be used to determine rate of reaction?
Small samples can be taken at regular intervals and titrated against a standard solution, change in concentration over time
How can electrical conductivity be used to determine rate of reaction?
If the number of ions changes, so will the conductivity
What is the rate constant?
K
What does the value of k change with?
Temperature
What do orders tell you?
How a reactant’s concentration affects the rate
How can orders of reaction be calculated?
From experimental data
What is the overall rider of a reaction?
The sum of all the orders of reaction of the reactants
What does a zero order concentration-time graph look like?
Straight line, top to bottom of Y axis
What does a zero-order rate-concentration graph look like?
Horizontal line
What does a first order concentration-time graph look like?
Curve, top to bottom
What does a first order rate-concentration graph look like?
Directly proportional
What does a second order concentration-time graph look like?
Steep curve, top to bottom
What does a second order rate-concentration time graph look like?
Curve, bottom to top
What is half life?
The time taken for half the reactant to be used up
How can orders of reaction be worked out?
Using the initial rates method
What is an example of the initial rates method?
A clock reaction
How is an initial rates method carried out?
Carrying out separate experiments using different initial concentrations of one reactant, then seeing how the change in Italy concentrations affects the rate