In this experiment, we explore the use of redox titration to determine the percentage by mass of iron (II) sulfate in iron tablets. By using potassium manganate in acidic solution, we can observe the permanent pink colour that indicates the end-point of the titration. With careful measurements and calculations, we can calculate the amount of iron (II) ions in the tablets and compare it with the information from the supplier. This experiment demonstrates the application of titration in analyzing the composition of drugs and supplements.
The Winkler method is a powerful analytical technique for measuring dissolved oxygen in water. With its ability to detect changes in temperature, it is an important tool for monitoring water quality and investigating the effects of global warming on aquatic ecosystems. This method involves several steps, including the addition of reagents that react with oxygen and the use of spectrophotometry to quantify the results. By understanding the Winkler method and its applications, we can gain valuable insights into the health of our water systems and take steps to protect them for future generations.
In chemistry, balancing equations is crucial to understanding the stoichiometry of a reaction. In this experiment, you will learn how to balance the equation for the reaction between sodium thiosulphate and iodine using titration with starch indicator. By determining the stoichiometric coefficients, you can gain insight into the reactants and products involved in the chemical equation. This experiment provides a great opportunity to improve your titration skills and interpretation of results.
In this experiment, we aim to determine the concentration of a solution of sodium hydroxide by titration against a standard solution of potassium hydrogen phthalate. We will use phenolphthalein as an indicator to show when the reaction is complete. To perform the titration, we will need a burette, pipette, conical flask, sodium hydroxide solution, and potassium hydrogen phthalate solution, among other requirements. We will also need to ensure accuracy by recording burette readings to the nearest 0.05 cm3 and repeating titrations until they agree within 0.10 cm3. Finally, we will analyze the effects of various errors on the calculated value of the concentration of sodium hydroxide and discuss the reasons for using a colourless to pink solution for titration.
In the world of laboratory work, accuracy is key. A primary standard like potassium hydrogen phthalate can help ensure that measurements are precise and reliable. By preparing a standard solution of this compound and using it in volumetric analysis, researchers can obtain accurate concentration measurements that are essential for a wide range of experiments. This article discusses the process of making a standard solution of potassium hydrogenphthalate, the importance of using primary standards, and the benefits of using volumetric analysis in the lab.
In this experiment, you'll be measuring the heat of combustion of a series of five primary alcohols, from methanol to pentanol. By burning a measured mass of an alcohol in a spirit lamp and transferring the heat energy released to a calorimeter containing water, you'll be able to calculate the heat of combustion. The experiment requires safety glasses, a thermometer, a calorimeter, and the primary alcohols, which are flammable and potentially poisonous. Once completed, you'll be able to plot a graph of your results and draw conclusions from the data.
Practical Science 