Influencing Factors (HSC SSCE Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is a key property of a catalyst?
What is a key property of a catalyst?
It increases rate without permanent change
What effect can a temp. rise have on some reactions?
What effect can a temp. rise have on some reactions?
Double the rate
What is a homogeneous reaction?
What is a homogeneous reaction?
Reactants all in the same phase
Where does a heterogeneous reaction occur?
Where does a heterogeneous reaction occur?
At the interface between two phases
How many main factors affect homogeneous reaction rates?
How many main factors affect homogeneous reaction rates?
Three factors
How many factors affect heterogeneous reaction rates?
How many factors affect heterogeneous reaction rates?
Five factors
Why does crushed limestone react faster than large lumps with acid?
Why does crushed limestone react faster than large lumps with acid?
Larger surface area exposed to acid
Why does stirring increase heterogeneous reaction rates?
Why does stirring increase heterogeneous reaction rates?
Brings fresh reactant to solid surface
What catalyst is used in the Haber process for ammonia synthesis?
What catalyst is used in the Haber process for ammonia synthesis?
Iron
Why does increasing concentration generally increase reaction rate?
Why does increasing concentration generally increase reaction rate?
More particles available to collide