Tag: temperature

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 – 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.

Determining the Value of Zero Kelvin through Extrapolation of Charles’s Law

Determining the Value of Zero Kelvin through Extrapolation of Charles’s Law

The aim of this practical investigation is to determine the value of zero Kelvin, also known as absolute zero, by extrapolating the relationship between temperature and volume for an ideal gas under constant pressure.

Cooling Curve

Cooling Curve

A cooling curve is a graph that shows the change in temperature of a substance over time as it cools down from a melted state to a solid state. This type of experiment can be useful for studying the cooling behaviour of substances and can also provide information about the purity and crystalline structure of the substance.

Freezing Point Depression of Sodium Chloride and Water

Freezing Point Depression of Sodium Chloride and Water

Freezing point depression is a phenomenon that occurs when a solute is added to a solvent, causing its freezing point to lower. In this practical investigation, we will explore the freezing point depression of water with different concentrations of sodium chloride (NaCl) and measure its impact on the freezing point. The experiment will involve preparing 50ml solutions of sodium chloride in water and measuring the temperature when the solution freezes over a range of salt concentrations from 1g to 20g per litre.

Investigating the Solubility of Different Substances in Different Solvents

Investigating the Solubility of Different Substances in Different Solvents

Solubility is the ability of a substance, known as the solute, to dissolve in a solvent to form a homogenous mixture called a solution. The solubility of a substance depends on the chemical nature of both the solute and the solvent, as well as external factors such as temperature, pressure, and the amount of solute or solvent. Substances that dissolve readily in a solvent are considered to be soluble, while those that do not are insoluble. Understanding solubility is important in many fields, including chemistry, biology, and environmental science.