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WorksheetsForm 4 Chemistry Chapter 7_Rate of Reaction
Total questions: 16
Worksheet time: 4hrs 0mins
What describes a reaction?
Products react and become reactants.
Reactants react and become products.
Reactants and products react and become new reactants.
Reactants and products react and become new products.
To determine the rate of reaction what should you measure?
How fast are the products forming.
How fast are the reactants being consumed.
How fast is the catalyst working.
Changes occur when a reaction is happening. We can measure these changes and determine the rate of reaction. What are the typical changes during a reaction?
Formation of precipitate
Increase in the mass of reactants
Decrease in the mass of reactants
Increase in the volume of product (gas)
Sodium hydroxide (NaOH) and hydrochloric acid (HCl) react to produce sodium chloride (NaCl), water (H2O) and heat. What are the reactants in this reaction?
Sodium hydroxide (NaOH)
Hydrochloric acid (HCl)
Sodium chloride (NaCl)
Water (H2O)
Heat
Sodium hydroxide (NaOH) and hydrochloric acid (HCl) react to produce sodium chloride (NaCl), water (H2O) and heat. What are the products in this reaction?
Sodium hydroxide (NaOH)
Hydrochloric acid (HCl)
Sodium chloride (NaCl)
Water (H2O)
Heat
A reaction between an acid and a reactive metal released 200 dm3 of hydrogen gas in 5 minute. What is the overall rate of reaction?
6.667 dm3/s
0.667 dm3/s
40 dm3/s
0.4 dm3/s
At the second minute of that reaction it was measured to have released 125 dm3 hydrogen gas. What is the rate of reaction for the first 2 minutes?
62.5 dm3/s
10.4 dm3/s
1.04 dm3/s
100 dm3/s
Which of these factors would increase rate of a reaction?
Decreasing the size of the reactants
Increasing the concentration of reactants
Increasing temperature
Presence of catalyst
Siti wants to cook potato stew. She needs the potatoes to cook faster. What can she do?
Cut the potatoes smaller.
Cook it at lower temperature,
Cook it in pressure cooker.
What needs to happen in order for a reaction to occur according to collision theory?
Reactants must collide with each other
Reactants must collide at correct orientation
Reactants must collide with enough energy to reach or surpass activation energy.
Reactants must all collide simultaneously.
True or False: Exothermic reaction releases heat...
True
False
True or False: In endothermic reaction, reactants start of with lower energy and the products end with higher energy. Thus the reactions absorbs energy/ heat.
True
False
Explain the effect of concentration on the rate of reaction (4 points).
Explain the effect of size of reactants on the rate of reaction (4 points).
Explain the effect of temperature on the rate of reaction (4 points).
Explain the effect of catalyst on the rate of reaction (4 points).
