Tag: Edexcel IGCSE

IBDP IA: Effect of Substrate Concentration on Catalase Activity: Michaelis-Menten Kinetics

IBDP IA: Effect of Substrate Concentration on Catalase Activity: Michaelis-Menten Kinetics

Catalase is one of the most efficient enzymes known, breaking down hydrogen peroxide into water and oxygen at rates of up to 40 million reactions per second. In this investigation, you will measure how the rate of catalase activity changes as substrate concentration increases, generating a Michaelis-Menten curve and allowing calculation of the maximum reaction velocity (Vₘₐˣ) and the Michaelis constant (Kₘ). This is a fully quantitative IB Biology HL Internal Assessment investigation. This practical is suitable for IB Diploma Biology HL and Edexcel IGCSE Biology.

Effective Revision Techniques for IB, IGCSE, and GCSE

Effective Revision Techniques for IB, IGCSE, and GCSE

Scoring top grades in IB Diploma, IGCSE or GCSE science is not just about intelligence — it is about how you revise. The students who consistently achieve the highest marks are not necessarily the ones who work the longest hours; they are the ones who use the right strategies. This guide brings together the most effective, evidence-based revision techniques to help you work smarter and perform at your best when it matters most.

Understanding Titration: Calculating Water of Crystallization

Understanding Titration: Calculating Water of Crystallization

This chemistry practical aims to determine the value of x in Fe(NH4)2(SO4)2.xH2O through titration with potassium manganate (VII). The experiment involves mixing ammonium iron(II) sulfate with dilute sulfuric acid and titrating until the endpoint is reached. Results facilitate calculations of water of crystallization in the compound.