Rates of Reaction

Question 1

Measurements

Answer 1

Mass - Balance
Volume - Gas Syringe

Question 2

Metals with Dilute Acid

Answer 2

• Gas Syringe
• Measure how fast hydrogen bubbles produced
• Zn + HCl → ZnCl2 + H2

Question 3

Calcium Carbonate with Dilute Acid

Answer 3

• Gas Syringe
• Measure how fast carbon dioxide produced
• CaCO3+ 2HCl → CaCl2 + CO2 + H2O

Question 4

Catalytic Decomposition of Hydrogen Peroxide

Answer 4

• Measuring cylinder, clamp, delivery tube
• Hydrogen decomposes in the presence of a catalyst to make oxygen and water
• Measure how fast the water is produced to measure the speed of the catalyst
• 2H2O2 → O2 + 2H2O

Question 5

Sodium Thiosulfate with Acid

Answer 5

• X on paper, timing reaction
  -Sodium Thiosulfate reacts with dilute hydrochloric acid to produce sodium chloride, sulfur dioxide, sulfur and water

Question 6

Activation Energy

Answer 6

• Colliding particles must have enough enery to produce a reaction
• The minimum amount of energy required to produce a certain reaction

Question 7

The Rate of Reaction

Answer 7

• The rate of reaction depends on the number of SUCCESSFUL collisions
• Raising the temperature increases the speed of the particles, therefore increases the number of collisions, therefore increasing the number of successful collisions
• Increasing the concentration increases the amount of particles, therefore increasing the amount of collisions, therefore increasing the amount of successful collisions
• Adding smaller solid particles increases the surface area of the solid, increasing collisions, increasing successful collisions
• Adding a catalyst increases the rate of reaction as it creates a new reaction pathway with a lower activation energy