Use indirect reaction pathways to calculate enthalpy changes that cannot be directly measured.
| Indicator | Colour in Acid | Colour in Alkali | |-----------|----------------|------------------| | Methyl orange | Red | Yellow | | Phenolphthalein | Colourless | Pink | edexcel ial chemistry unit 3 notes
Used to separate a product from a reaction mixture based on boiling points. The condenser is placed sloped/horizontally. Purification: Separating Funnel: Used to separate aqueous and organic layers. Drying Agents: Adding anhydrous salts (like cap M g cap S cap O sub 4 cap C a cap C l sub 2 Use indirect reaction pathways to calculate enthalpy changes
(like Alcohols or Aldehydes) that you would like to dive deeper into? Review the official Edexcel IAL Core Practical Guide
Need more help? Review the official Edexcel IAL Core Practical Guide and the Examiner’s Reports from the last 5 years to see exactly where students lose marks.
You must be fast and accurate with these:
– Using calorimetry and Hess’s Law to determine the heat energy change of a reaction.