purity and formulations

• What is meant by a formulation in chemistry?

  A complex mixture designed as a useful product
• What can a pure substance be?

  A single element or a single compound
• What is the key characteristic of a pure substance?

  It is not mixed with any other substance
• How can we determine if a substance is pure?

  By measuring its melting point and boiling point
• What happens to the temperature of a pure substance at its melting point?

  The temperature stops rising
• What is the fixed melting point of pure water?

  0 degrees Celsius
• What is the fixed boiling point of pure water?

  100 degrees Celsius
• What does it indicate if a substance melts and boils over a range of temperatures?

  That the substance is not pure
• What shape does the graph of a pure substance's melting and boiling points typically have?

  A similar shape graph with fixed points
• What is the difference between a pure substance and an impure substance in terms of melting and boiling points?

  A pure substance has fixed melting and boiling points, while an impure substance does not
• What is the main purpose of measuring the quantities of components in a formulation?

  To ensure the product has the desired properties
• Can you give an example of a formulation?

  Examples include medicines, cosmetics, and cleaning products
• What are the characteristics of a pure substance?

  • Consists of only a single element or compound
  • Has fixed melting and boiling points
  • Not mixed with any other substance
• How do you identify if a substance is pure using experimental data?

  1. Measure the melting point.
  2. Measure the boiling point.
  3. Compare with known fixed values for pure substances.
• What is the significance of formulations in chemistry?

  • Designed for specific uses
  • Components are carefully measured
  • Ensure desired properties in the final product