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Dilutions quiz

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  • What is a stock or standard solution in the context of dilutions?
    A stock or standard solution is a concentrated solution that will be diluted for laboratory use later on.
  • What does the process of dilution involve?
    Dilution involves adding more solvent, usually water, to a solution to decrease its concentration.
  • How does the color of a solution typically change during dilution?
    The color of the solution becomes lighter, indicating a lower concentration of solute.
  • What equation is used to relate the concentrations and volumes before and after dilution?
    The equation used is M1V1 = M2V2.
  • In the equation M1V1 = M2V2, what do M1 and V1 represent?
    M1 and V1 represent the molarity and volume before dilution.
  • In the equation M1V1 = M2V2, what do M2 and V2 represent?
    M2 and V2 represent the molarity and volume after dilution.
  • How is the final volume (V2) after dilution calculated?
    V2 is calculated as the initial volume (V1) plus the volume of solvent added.
  • How does the molarity change as a result of dilution?
    The molarity decreases, so M2 is always less than M1.
  • Why is understanding dilutions important in laboratory settings?
    It ensures accurate preparation of solutions and precision in experimental procedures.
  • What happens to the amount of solute during dilution?
    The amount of solute stays the same; only the concentration changes.
  • If you start with a dark purple solution and add water, what does the lighter color indicate?
    The lighter color indicates a lower concentration of solute.
  • What is the typical solvent used in dilution processes?
    The typical solvent used is water.
  • If you know M1, V1, and M2, how can you find V2?
    You can rearrange the equation to solve for V2: V2 = (M1V1)/M2.
  • What is the main purpose of performing a dilution?
    The main purpose is to obtain a solution with a lower concentration from a more concentrated one.
  • Does the volume of the solution increase or decrease during dilution?
    The volume of the solution increases because more solvent is added.