The Gas Constant R for Ideal Gases
Location: CL2 Mendeleev Lab Instructor: Yunjuan, Zhang Instructions: According to the ideal gas law pV = nRT, if p, V, n, and T are measured in the experiment, the gas constant R can be calculated. In this experiment, a fixed amount of magnesium reacts with excess dilute sulfuric acid to produce hydrogen gas. The gas constant R can be calculated by measuring the volume of hydrogen gas produced. Equipment: None Manual Determination of the Gas...
Determination of the Hardness of Water
Location: CL2 Mendeleev Lab Instructor: Yunjuan, Zhang Instructions: Water hardness is an important monitoring index of water quality. By testing the hardness of the water, we can determine whether the water can be used in industrial production and daily life. The total hardness of water refers to the total amount of Ca2+ and Mg2+ in the water. The higher the content of calcium and magnesium in water, the harder the water. The total hardness of...
Determination of Dye Concentration Using a UV-Vis Spectrophotometer
Location: CL 1 Dalton Lab Instructor: Yunjuan, Zhang Instructions: In this experiment, you will determine the concentration of Allura Red Dye (FD&C Red No. 40) in a drink. By mixing a series of known concentration solutions of the dye and measuring absorbance ultraviolet-visible (UV-Vis) light for each, a calibration curve can be made to determine the unknown drink concentration. Equipment: UV-Vis Spectrophotometer Manual Determination of Dye Concentration Using a UV-Vis Spectrophotometer
Determination of Chemical Oxygen Demand (COD) in Water (Potassium Permanganate Method)
Location: CL 2 Mendeleev Lab Instructor: Yunjuan, Zhang Instructions: The level of Chemical Oxygen Demand (COD) in water is one of the important indicators of water quality pollution. It is a parameter that is frequently measured in environmental protection and water quality control. COD refers to the milligrams of oxygen consumed when reducing substances in 1 liter of water are oxidized under specific conditions. Equipment: None
Analysis of Structure of Sodium Chloride and Polystyrene Using X-Ray Diffration
Location: CL 1 Dalton Lab Instructor: Yunjuan, Zhang Instructions: In this experiment we will record the diffraction peaks of an ionic solid (sodium chloride) and an organic polymer (polystyrene) by X-Ray Diffraction (XRD). Analysis of the data provides insight to the nature of the compounds themselves. Equipment: XRD Manual Analysis of Structure of Sodium Chloride and Polystyrene Using X-Ray Diffration
Determination of Relative Molecular Mass of Glucose by Freezing Point Depression Method
Location: CL 1 Dalton Lab Instructor: Yunjuan, Zhang Instructions: When a solute is dissolved in a solvent, the freezing point of the solvent decreases, which is one of the colligative properties of dilute solutions. The depression of the freezing point of a non-volatile and non-electrolyte dilute solution is directly proportional to the molal concentration of the solution. Equipment: Self-cooling Freezing Point Tester