rates of reaction Flashcards
(18 cards)
if a reaction happens slowly is the rate low or high
low rate of reaction
what is the word equation for reaction
Acid + Metal -> Salt + Hydrogen
what are the two ways to measure the rate of a reaction
- measure the rate at which a reactant is used up
- measure the rate at which a product is formed
what is the equation is used to calculate the rate of reaction?
Rate of reaction = Reactant used or product formed
—————————————————-
time
What is the difference between reactions that happen slowly and those that happen quickly?
Reactions that happen slowly have a low rate of reaction, while those that happen quickly have a high rate of reaction.
What is an example of a reaction with a low rate of reaction?
The oxidation of iron (rusting).
What is an example of a reaction with a high rate of reaction?
Explosions.
What two ways can the rate of a reaction be measured?
- Measure the rate at which a reactant is used up
- Measure the rate at which a product is formed.
What is the word equation for an acid reacting with a metal?
Acid + Metal → Salt + Hydrogen.
How can the change in mass during a reaction be measured?
Using a balance.
How can the volume of a gas produced in a reaction be measured?
Using a gas syringe.
What is the usual method for recording the loss of mass or volume of gas during a reaction?
Record at regular intervals (e.g., every minute) and plot a graph.
What formula can be used to calculate the rate of reaction?
Rate of reaction = Reactant used or product formed / Time.
If 24 cm³ of hydrogen gas is produced in two minutes, what is the mean rate of reaction?
12 cm³ hydrogen / min.
If 95 cm³ of oxygen is produced in 3 minutes, how is the rate of reaction expressed?
Rate of reaction = 95 cm³ / 3 minutes.
When describing the rate of reaction, what must you refer to?
Time.
Fill in the blank: The mass increases by ______ per minute.
1 g.
True or False: The rate of reaction can be described in terms of the volume of gas produced per minute.
True.
