Purity & Formulations

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

  Analytical chemistry
• What does chemical analysis involve?

  Separating, identifying, and quantifying substances
• What are some methods used in chemical analysis?

  • Paper chromatography
  • Filtration
  • Crystallization
  • Distillation
• What is a pure substance?

  Contains only one type of compound or element
• Why is pure water considered a pure substance?

  It contains only water molecules
• Why can't we call salt water a pure substance?

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

  Only pure substances have specific melting and boiling points
• At what temperature does water boil?

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

  801 degrees Celsius
• What happens to the boiling point of impure substances?

  It increases compared to pure substances
• What is the melting point of salt water?

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

  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 is the significance of maintaining proportions in formulations?

  • Ensures consistent properties
  • Allows for repeated production
  • Essential for specific functions