2: Experiments
- Page ID
- 386946
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- 2.1: Using Excel for Graphical Analysis of Data (Experiment)
- An important technique in graphical analysis is the transformation of experimental data to produce a straight line. If there is a direct, linear relationship between two variable parameters, the data may be fitted to the equation of line with the familiar form y=mx+b through a technique known as linear regression. The objective of this exercise is to use Excel to explore a number of linear graphical relationships.
- 2.2: The Densities of Solutions and Solids (Experiment)-Home Version
- Density is a fundamental physical property of matter. Physical properties are those characteristics of a substance that can be determined without changing the chemical identity of the substance. Other physical properties include melting point and solubility. In general, since different substances have unique densities, determining the density of an unknown substance can help identify it.
- 2.3: Structure and Isomerism of Hydrocarbons-Molecular Modelling-Simulation-Home
- This simulation lab is designed to explore the structure of hydrocarbons with respect to their types of bonding, geometry, and structural isomerism. Naming and 3D visualization of the structures can also be practiced.
- 2.4: Synthetic Polymers and Plastics (Experiment)-Home Version
- The word “polymer” means “many units”. A polymer can be made up of many repeating units, which are small monomer molecules that have been covalently bonded. Figure 1 (from Chemistry in Context) shows a single monomer, and a polymer made of identical monomers linked together. A polymer can contain hundreds of monomers, totaling thousands of atoms. Plastic is a type of synthetic polymer. Currently, more than 60,000 plastics are manufactured for industrial and commercial purposes.
- 2.5: Equilibrium and Le Chatelier's Principle (Experiment)-Home Version
- A reversible reaction is a reaction in which both the conversion of reactants to products (forward reaction) and the re-conversion of products to reactants (backward reaction) occur simultaneously. A reversible reaction at equilibrium can be disturbed if a stress is applied to it and the reversible reaction will undergo a shift in order to re-establish its equilibrium. This is known as Le Chatelier’s Principle.
- 2.6: Acidity-pH Indicators, Acid-base Equilibria, and Acid Dissociation Constant-Home
- A homemade pH indicator is prepared and compared with standard pH strips. Acid dissociation constant is calculated from the pH value of a weak acid.
- 2.7: Volumetric Titration-Home
- Iodometric titration of Vitamin C is conducted to find out the concentration of Vitamin C in an unknown sample of fruit juice. Calibration techniques will also be discussed.
- 2.8: Kinetics- Iodine Clock using Vitamin C and the Calculation of Initial Rate-Home
- This experiment is a wet lab designed to calculate the rate of of Vitamin C oxidation using initial rate method. Graphical analysis of the data will be used to find the rate law for the reaction. The limitations of this experiment: the chemicals used are not the pure standardized sources for the reagents and the results will be less accurate because of a great extent of estimations applied.
- 2.9: Determination of the Molar Mass by Freezing Point Depression (Experiment)-Home Version
- The objective of this experiment is to determine the molar mass of an unknown solid using the colligative property of freezing point depression. The original experiment is modified to substitute the original reagents with a non-hazardous chemicals.