Chem1B Quiz Buster 3

Which of the following factors does not influence the rate of reaction?

• Reaction concentration

• Temperature

• Physical state of reactants

• Physical state of products

Which of the following statements are incorrect regarding Le Chatelier’s principle? 

• If a system in equilibrium has part of its products removed, the equilibrium will shift towards the reactants.

• If a closed system in equilibrium has its pressure increased, the equilibrium will favour the side of the chemical equation with the least molecules 

• If the temperature is increased during an exothermic reaction in equilibrium, the reaction will go on to produce more reactants 

• None of the above

• 1st Order

• 2nd Order

• 3rd Order

• Must be determined experimentally  

   

The rate determining step of a chemical reaction can be best described as  

• The final step or elementary reaction 

• The first step or elementary reaction

• The step impacted by the addition of the catalyst 

• The slowest step or elementary reaction

Water reacts with carbon dioxide to produce bicarbonate. You start with 0.5 moles of both reactants and at equilibrium you have 0.4 moles of both. Would the reaction favour the products or reactants?

H₂O + CO₂ → H₂CO₃

• Products

• Reactants

• Neither

• There is not enough information to tell

Which of the following is true about a catalyst?

• A catalyst changes the rate of reaction while undergoing a permanent change

• The action caused by a catalyst is called catalysis

• A heterogenous catalyst exists in the same phase as the reactants

• A homogenous catalyst exists in a separate phase as the reactants

• 0.25

• 0.89

• 0.41

• 0.112

If the equilibrium constant is greater than 1

• There are more reactants than products

• There are more products than reactants

• There are equal amounts of products and reactants

• The reaction cannot proceed

1.      The following data is from the reaction 2R + S → T + U. What is the rate law for this?

• Rate = k([R]² + [S])

• Rate = k[2R][S]

• Rate = k[R]²[S]²

• Rate = k[R]²[S]