Chemistry Paper 2: Rates of Reaction

The rate of reaction is a measure of how much ​ (a)   are used or ​ (b)   produced per unit of ​ (c)  

• reactant(s)
• product(s)
• time
• elements
• hours
• reactions

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NGSS.HS-PS1-5

Select all equations which can be used to calculate the mean rate of a reaction:

Mean rate =

• Quantity of reactant used ÷ Time Taken

• Quantity of reactant used x Time Taken

• Quantity of product formed ÷ Time Taken

• Quantity of product formed x Time Taken

• Quantity of product formed ÷ Reactant used

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In a chemical reaction the mass of the reaction decreased by 15g in 5s, what is the rate of reaction?

(a)   g/s

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NGSS.HS-PS1-7

In a chemical reaction 70cm³ of gas was collected in a gas syringe in 5s, what is the mean rate of reaction?

(a)   cm³/s

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Which units can be used as a measure of rate of reaction?

• s

• mol/s

• g/cm³

• g/s

• cm³/s

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What 2 pieces of equipment could be used to measure the rate of reaction for a reaction that produces a gas?

• 
• 
• 
• 
• 

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Match the following

• Volume

• g/s

• Rate of Reaction

• g

• Mass

• Rate of Reaction

• g/cm³

• cm³

• cm³/s

• Concentration

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Organize these options into the right categories

Groups:

(a) Increase Rate

,

(b) Decrease Rate

• Increase the Temperature of the Reaction

• Add a Catalyst

• Increase Surface Area of Reactants

• Decrease the Temperature of the Reaction

• Decrease the pressure in a gas reaction

• Decrease concentration of Reactants

• Increase concentration of Reactants

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At what point on the graph is the rate of reaction fastest?

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At what point on the graph has the reaction stopped?

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