Chemistry: Effect of Reactants on Product Formation
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Questions and Answers

What happens when more reactants are used in a chemical reaction?

  • The same amount of products is produced
  • The reaction slows down
  • No reaction occurs
  • More products are produced (correct)

    • What can be inferred about the reactivity of calcium and hydrogen in the reaction Ca + 2HCl → CaCl2 + H2?

  • The reactivity of calcium and hydrogen is the same
  • Calcium is more reactive than hydrogen (correct)
  • Hydrogen is more reactive than calcium
  • The reaction is unaffected by the reactivity of calcium and hydrogen

    • Which of the following is NOT a key concept of the collision theory?

  • Nature of the reactants
  • Humidity (correct)
  • Concentration
  • Temperature

    • What is the effect of increasing temperature on the rate of a chemical reaction?

    <p>The rate of reaction increases</p> Signup and view all the answers

    Which of the following statements explains why reaction rates generally increase with an increase in temperature?

    <p>I, II, and IV only</p> Signup and view all the answers

    In the reaction Ca + 2HCl → CaCl2 + H2, what type of reaction occurs?

    <p>Combination reaction</p> Signup and view all the answers

    What is the relationship between the amount of reactants used in a chemical reaction and the amount of products produced?

    <p>More reactants have more atoms to react to form more products.</p> Signup and view all the answers

    What can be inferred about the reaction between calcium and hydrochloric acid based on the equation Ca + 2HCl → CaCl2 + H2?

    <p>Calcium reacts with hydrochloric acid to form calcium chloride and hydrogen gas.</p> Signup and view all the answers

    What is the effect of temperature on the frequency of molecular collisions in a chemical reaction?

    <p>Molecules collide more frequently at higher temperatures.</p> Signup and view all the answers

    Why does an increase in temperature result in a decrease in the activation energy required for a chemical reaction?

    <p>It is not a correct statement. The activation energy does not decrease with an increase in temperature.</p> Signup and view all the answers

    What is the effect of an increase in temperature on the fraction of high-energy molecules in a chemical reaction?

    <p>The fraction of high-energy molecules is greater at higher temperatures.</p> Signup and view all the answers

    What is the relationship between the concentration of reactants and the rate of a chemical reaction?

    <p>The concentration of reactants does not necessarily increase with an increase in temperature.</p> Signup and view all the answers

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