Purity and Formulations

• What is another name for chemical analysis?

  Analytical chemistry
• Chemical analysis uses instruments and methods to separate, identify, and quantify different substances.
• Arrange the following examples of chemical analysis methods in the order they are mentioned in the study material.

  1️⃣ Paper chromatography

  2️⃣ Filtration and crystallization

  3️⃣ Distillation

  4️⃣ Chemical tests
• A pure substance contains only one type of compound or element.
• Give an example of a pure substance.

  Water
• A mixture of two different compounds is considered impure
• Pure substances have specific melting and boiling points.
• What is the boiling point of water?

  100°C
• What is the melting point of sodium chloride?

  801°C
• Testing the physical properties of a substance is called a chemical test.

  False
• What happens to the melting point of water when salt is added?

  It decreases
• Adding impurities to a pure substance generally increases its boiling point.
• Saltwater has a boiling point of around 100.5°C.
• What is a formulation in chemistry?

  A mixture with precise proportions
• Formulations are used to create mixtures with a specific purpose.
• The components of a formulation are always in the same proportions.
• Name an example of a product that uses formulations.

  Green paint
• What type of property might a component add to green paint?

  Green color