Purity & Formulations

• What is the field of chemical analysis also known as?

  Analytical chemistry
• What does chemical analysis involve?

  Instruments and methods to separate, identify, and quantify substances
• What is a pure substance?

  Contains only one type of compound or element
• Why can't we call saltwater a pure substance?

  It is a mixture of two different compounds
• Why is the purity of a substance important?

  Only pure substances melt and boil at specific temperatures
• At what temperature does pure water boil?

  100 degrees Celsius
• At what temperature does sodium chloride melt?

  801 degrees Celsius
• What can we infer if a liquid boils at 100 degrees Celsius?

  It is likely pure water
• What type of test is used to identify substances based on boiling points?

  Physical test
• How do we identify unknown substances in the lab?

  By testing their melting and boiling points
• What happens to the melting and boiling points of impure substances?

  They melt and boil over a range of temperatures
• How do impurities affect the melting point of a sample?

  They lower the melting point
• What is the melting point of saltwater compared to pure water?

  About minus 2 degrees Celsius
• What is the boiling point of saltwater?

  Around 100.5 degrees Celsius
• What are formulations in chemistry?

  • Mixtures prepared using a specific formula
  • Contain precise amounts of components
  • Used for specific purposes (e.g., fuels, medicines)
• How are formulations similar to recipes?

  They require specific proportions of components
• What do different components in a formulation contribute?

  Different properties for the final product
• What is the process of creating a formulation?

  1. Try different combinations of components
  2. Achieve the desired properties
  3. Use the same formula repeatedly
• What should you do if you enjoyed the video?

  Like and subscribe