Tag: practical

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.

IBDP IA: Simple Pendulum: Length vs Period and Determination of g

IBDP IA: Simple Pendulum: Length vs Period and Determination of g

The simple pendulum is one of the most studied systems in classical mechanics. By measuring how the period of oscillation changes with pendulum length, you can determine the local gravitational field strength g with remarkable precision from a school laboratory. The relationship T² ∝ L produces a clean linear graph whose gradient directly yields g, making this an ideal IB Physics IA for demonstrating rigorous uncertainty analysis. This practical is suitable for IB Diploma Physics HL and SL and Edexcel IGCSE Physics.

IBDP IA: Capacitor Discharge: Time Constant vs Resistance and Measurement of Capacitance

IBDP IA: Capacitor Discharge: Time Constant vs Resistance and Measurement of Capacitance

When a charged capacitor discharges through a resistor, the voltage decays exponentially with time. The time constant τ = RC determines how quickly this happens. By measuring τ for different resistance values, you can verify the linear relationship τ = RC and calculate the capacitance of the capacitor. A data logger makes this investigation particularly powerful, generating rich continuous voltage-time data for each resistance. This is an outstanding IB Diploma Physics HL Internal Assessment topic.

Determining Water of Crystallization in Copper(II) Sulfate

Determining Water of Crystallization in Copper(II) Sulfate

Determine the number of moles of water of crystallisation in hydrated copper(II) sulfate by heating to constant mass. Classic IB, A-level and GCSE chemistry practical with full method, safety notes and calculations.