WorksheetsRate of Reaction
Total questions: 25
Worksheet time: 25mins
Which of the following is the rate of reaction?
How fast the reaction is
How big the reaction is
How loud the reaction is
How much gas is being produced
Which of the following does not affect the rate of reaction?
concentration of solution
using a catalyst
color of the solution
Magnesium reacts with hydrochloric acid. Which temperature of hydrochloric acid will produce higher rate of reaction?
20 OC
40 OC
60 OC
What effect does increasing the concentration of reactants have on the rate of reaction?
It decreases the rate of reaction.
It has no effect on the rate of reaction.
It increases the rate of reaction.
It stops the reaction.
Which of the following factors does NOT affect the rate of a chemical reaction?
Temperature
Colour of the reactants
Concentration of reactants
Surface area of reactants
If the concentration of a reactant is increased, what is the effect on the rate of reaction?
The rate of reaction decreases.
The rate of reaction increases.
The rate of reaction remains unchanged.
The reaction stops.
How quickly a reaction will take place is called what?
Reaction Rate
Temperature
Catalyst
Pressure
How does increasing the temperature generally affect the rate of a chemical reaction?
It decreases the reaction rate.
It has no effect on the reaction rate.
It increases the reaction rate.
It stops the reaction.
which factor that affect reaction rate is represented?
Temperature
Catalyst
Surface Area
Concentration
In standard conditions data for line B was recorded. If we run the reaction again with reactants at lower concentrations, which line of data would likely be recorded?
A
B, again
C
No reaction occurs
Magnesium reacts with hydrochloric acid. Which concentration of hydrochloric acid produce higher rate of reaction?
0.5 g/dm3
1.5 g/dm3
2.5 g/dm3
Magnesium reacts with hydrochloric acid. Which magnesium will produce higher rate of reaction?
large one piece metal
crushed into powder
cut into ten pieces
Which of the following does not happen when catalyst is added to a chemical?
Rate of chemical reaction increases
Catalyst remain unchanged
Size of catalyst increases
What is meant by rate of reaction?
Decrease in the quantity of a reactant or product during a chemical reaction
Change in the quantity of a reactant or product over time
Change in the quantity of a reactant or product during a chemical reaction
Change in the quantity of a reactant or product per unit time
Select the factors that affect the rate of a reaction
temperature
concentration
total surface area
catalyst
pressure
The rate of a chemical reaction is NOT affected by which of the following:
temperature
concentration
particle size (total surface area)
volume
Grinding a seltzer tablet into powder increases the rate of reaction due to...
increased concentration of reactants
increased total surface area
increased speed of particles.
better orientation of reactants
Which of these will NOT speed up the rate of reaction between a strip of magnesium and hydrochloric acid?
twist the strip of magnesium
grind up the strip of magnesium
increase the concentration of the hydrocholoric acid
increase the temperature of the hydrocholoric acid
What is the average rate of reaction in the second minute?
14.0 cm3 min-1
16.0 cm3 min-1
18.0 cm3 min-1
28.0 cm3 min-1
An experiment is carried out to study the effect of concentration on the rate of reaction between sodium thiosulphate and hydrochloric acid.
Graph of the concentration of sodium thiosulphate against 1/time is as shown.
Based on the graph, what is the value of t if the experiment is repeated using sodium
thiosulphate solution 0.025 mol dm-3.
32.3 s
50.0 s
0.020 s
0.031s
Diagram 4 shows the graph of volume of carbon dioxide gas against time when 5 g of marble chips is added to 50 cm3 of 0.2 mol dm-3 hydrochloric acid. At what time the rate of reaction the highest?
t1
t2
t3
t4
Which of the following factors will increase the rate of a chemical reaction?
Increasing the temperature
Decreasing the concentration of reactants
Adding an inert gas
Decreasing the surface area of reactants
In an experiment, a student measures the time taken for a reaction to complete at different temperatures. What is the student investigating?
The effect of temperature on reaction rate
The effect of concentration on reaction rate
The effect of pressure on reaction rate
The effect of catalyst on reaction rate
A catalyst is added to a reaction mixture. What is the role of the catalyst in the reaction?
It increases the rate of reaction without being consumed
It decreases the rate of reaction by being consumed
It changes the products of the reaction
It increases the temperature of the reaction
Which graph best represents the relationship between concentration of reactants and rate of reaction?
A linear graph showing a direct proportionality
A horizontal line showing no change
A downward sloping line showing inverse proportionality
A parabolic curve showing exponential growth
