level: Chemical analysis
Questions and Answers List
level questions: Chemical analysis
| Question | Answer |
|---|---|
| What is a pure substance | Single element or compound |
| What are some examples of pure substances | Water, glucose, oxygen, sodium chloride etc |
| What is a formulation | Mixtures of chemicals that are designed to create more useful products |
| Give me an example of a formulation | Metal alloys, medicines and fertilisers |
| Pure substances on melting and boiling | Only pure substances melt and boil at specific temperatures |
| What does water boil at | 100 degrees celcius |
| What does sodium chloride melt at | 801 degree celcius |
| Impure substances on melting and boiling | They melt and boil over a range of temperatures depending on how much of each substance is in the mixture |
| Impurities on melting and boiling point | - lower melting point - increase boiling point |
| Quantity of each component in a formulation | Each chemical component must be measured in precise quantity to ensure that the formulation works |