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Tag: IB
Iron tablet titration is a common laboratory method used to determine the amount of iron present in a sample, such as an iron supplement tablet. This method involves reacting the iron in the tablet with a solution of potassium permanganate (KMnO4) to produce a purple colour. The endpoint of the titration is reached when the purple colour disappears, indicating that all of the iron in the tablet has reacted with the KMnO4.
Esterification is a common organic reaction that involves the reaction of a carboxylic acid with an alcohol to form an ester and water. In this experiment, we will be carrying out an esterification reaction to test the equilibrium position at different temperatures using ethanoic acid and ethanol. Safety precautions: • Wear personal protective equipment (PPE) … Continue reading Esterification Reaction and equilibrium constant determination.
The Winkler method is a widely used analytical technique for determining the amount of dissolved oxygen in water samples. Dissolved oxygen is essential for aquatic life and is an important indicator of water quality. The Winkler method involves the addition of reagents to a water sample that react with dissolved oxygen to produce a measurable … Continue reading The Winkler Method – Biological Oxygen Demand BOD
This criterion assesses the student's ability to draw valid conclusions based on the evidence obtained and to evaluate the reliability and limitations of the investigation. The assessment looks for evidence of appropriate analysis and interpretation of the data, clear conclusions, and an understanding of the limitations of the investigation. Restate the research question or hypothesis … Continue reading How to score full marks in the Conclusion and Evaluation in the IBDP Internal Assessment (IA) or Extended Essay (EE)
The Internal Assessment (IA) for Chemistry in the International Baccalaureate Diploma Programme (IBDP) is an experimental investigation that requires students to demonstrate their ability to design and conduct experiments, analyze data, and draw conclusions. Here is a plan for a Chemistry IA:Topic Selection: Choose a topic that interests you and aligns with your learning objectives. … Continue reading How to write the perfect Chemistry Internal Assessment (IA)
Chemical synthesis of aspirin Aspirin, also known as acetylsalicylic acid, can be synthesized through a process called esterification. Here are the steps for the chemical synthesis of aspirin: Materials needed: Salicylic acid (2-hydroxybenzoic acid) Acetic anhydride Sulfuric acid Water Sodium bicarbonate Ice Instructions: In a flask, mix 10 g of salicylic acid with 20 mL … Continue reading Aspirin Synthesis
Practical Science 