Discovering Photosynthesis: Testing a Leaf for Starch – A Hands-On Practical Experiment

Discovering Photosynthesis: Testing a Leaf for Starch – A Hands-On Practical Experiment

Dive into the captivating world of plant biology with our hands-on practical experiment, designed to demonstrate the process of photosynthesis by testing a leaf for starch. By examining starch production in leaves, we can explore the incredible process through which plants convert sunlight into energy, producing the oxygen we breathe and the food we eat. This experiment offers an interactive and engaging way to learn about photosynthesis and develop a deeper appreciation for the crucial role plants play in sustaining life on our planet. Follow our detailed step-by-step guide and immerse yourself in the wonders of plant biology.

Titration – Exam Practice

Titration – Exam Practice

Titration is an essential technique used in many areas of chemistry to determine the concentration of a solution. In this practical experiment, the aim is to determine the value of x in Fe(NH4)2(SO4)2.xH2O using titration against a standard solution of potassium manganate (VII). The obtained results are used to calculate the amount of water of crystallization in the salt. This blog post provides an overview of titration and its importance in chemistry, as well as a step-by-step procedure and calculations for the Fe(NH4)2(SO4)2.xH2O experiment.

Enthalpy – Thermometric titration

Enthalpy – Thermometric titration

Thermometric titration is a powerful technique used to determine the concentration of acids and bases by measuring the temperature change during a chemical reaction. In this article, we explore the process of thermometric titration and how it is used to calculate the enthalpy change of neutralization for hydrochloric acid and ethanoic acid using a standard solution of sodium hydroxide. We outline the required materials, the titration procedure, and the calculation process involved. Additionally, we answer common questions about the enthalpy change of neutralization, the experimental results for hydrochloric acid, and the heats of neutralization for weak acids and bases.

Enthalpy – Hess Cycles

Enthalpy – Hess Cycles

Learn how to plan an investigation and select the correct variables to control with this experiment to determine the enthalpy change for the reaction MgSO4 (s) + 7H2O(l) → MgSO4•7H2O(s) using Hess cycles. By measuring the enthalpy change of solution for the two solids and using a Hess cycle to calculate the enthalpy change for the reaction, we can gain a better understanding of thermodynamic principles.

Enthalpy – Student Design

Enthalpy – Student Design

In this experiment, students will have the opportunity to develop their practical and analytical skills, which are essential for the IA internal assessment or practical exams. By investigating the enthalpy change that occurs when solid ammonium chloride dissolves in water, students will learn how to conduct a scientific experiment using calorimetry techniques. This experiment will also allow students to calculate the enthalpy change and analyze their results, which will help them to understand the importance of accuracy and precision in scientific measurements. By engaging in this experiment, students will gain valuable experience in carrying out practical chemistry experiments and will be better equipped to succeed in their internal assessments or practical exams.

Titration – Precipitation

Titration – Precipitation

This experiment involves the determination of the number of water molecules of crystallization in hydrated barium chloride using titration and precipitation techniques with silver nitrate and potassium chromate. The procedure involves the reaction of chloride ions with silver ions to form a red precipitate of silver chromate, which indicates the end-point of the reaction. Barium ions also react with chromate ions, and to remove them, sulphate ions are added. The mass of anhydrous barium chloride and water present in the sample is calculated, and the ratio of BaCl2 to H2O is determined to find the value of x in the formula BaCl2•xH20. This experiment provides a great opportunity to understand the principles of titration and precipitation methods used to calculate the water of crystallization in compounds.