Search
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/General_Chemistry_Labs/Online_Chemistry_Lab_Manual/Chem_11_Experiments/14B%3A_Atomic_Emissions_Spectra_-_Pizza_Box_Version_(Experiment)Electrons in atoms normally occupy the lowest energy states possible. Such an atom is said to be in the ground state. However, electrons can be excited to high energy states when they absorb energy. T...Electrons in atoms normally occupy the lowest energy states possible. Such an atom is said to be in the ground state. However, electrons can be excited to high energy states when they absorb energy. This energy can be provided by heat, light, or an electrical discharge. The electrons will then return to lower energy states, eventually returning all the way to the ground state. As the electrons return to lower energy states, they release their excess energy, often in the form of light.
- https://chem.libretexts.org/Courses/Minnesota_State_Community_and_Technical_College/CHEM_1112%3A_General_Inorganic_Chemistry_II_Lab_Manual-Online_Section/02%3A_Experiments/2.09%3A_Determination_of_the_Molar_Mass_by_Freezing_Point_Depression_(Experiment)-Home_VersionThe 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 o...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.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/General_Chemistry_Labs/Online_Chemistry_Lab_Manual/Chem_12_Experiments/09%3A_Electrolytic_Determination_of_Equivalent_Mass_(Experiment)The objective of this experiment is to use electrolysis to determine the equivalent mass of an unknown metal.
- https://chem.libretexts.org/Courses/University_of_California_Davis/Chem_4B_Lab%3A_General_Chemistry_for_Majors_II/4%3A_Determination_of_the_Molar_Mass_by_Freezing_Point_Depression_(Experiment)/4.P%3A_Determination_of_the_Molar_Mass_by_Freezing_Point_Depression_(Pre-Lab)When 0.186 g of an unknown organic solid is dissolved in 22.01 g of liquid camphor, the freezing point of the mixture is found to be 176.7 o C. If you dissolve the same solid in H2O (\(K_{f}\...When 0.186 g of an unknown organic solid is dissolved in 22.01 g of liquid camphor, the freezing point of the mixture is found to be 176.7 o C. If you dissolve the same solid in H2O (Kf = 1.86 o C/molal) to the same final molality as you had it in the PDB, what would the change in freezing point be? You are instructed to add about 2 g of the unknown solid when determining the freezing point of the solution.
- https://chem.libretexts.org/Courses/University_of_California_Davis/Chem_4B_Lab%3A_General_Chemistry_for_Majors_II/4%3A_Determination_of_the_Molar_Mass_by_Freezing_Point_Depression_(Experiment)/4.R%3A_Determination_of_the_Molar_Mass_by_Freezing_Point_Depression_(Lab_Report)The second line is applied to data points that correspond to the co-existence of both the solid and liquid (freezing): these are the points on the part of the graph where the temperature levels out. O...The second line is applied to data points that correspond to the co-existence of both the solid and liquid (freezing): these are the points on the part of the graph where the temperature levels out. On a separate sheet of paper, show the equations used and calculations performed for molality of the solutions, moles of unknown in the solutions, and molar mass of the unknown.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/General_Chemistry_Labs/Online_Chemistry_Lab_Manual/Chem_12_Experiments/10%3A_Determination_of_the_Molar_Mass_by_Freezing_Point_Depression_(Experiment)The objective of this experiment is to determine the molar mass of an unknown solid using the colligative property of freezing point depression.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/General_Chemistry_Labs/Online_Chemistry_Lab_Manual
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/General_Chemistry_Labs/Online_Chemistry_Lab_Manual/Chem_12_Experiments/08%3A_Qualitative_Analysis_of_Anions_Using_Spot_Plates_(Experiment)The objective of this experiment is to use spots tests to identify common anions in an aqueous solution.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/General_Chemistry_Labs/Online_Chemistry_Lab_Manual/Chem_11_Experiments/15%3A_Using_Periodic_Properties_to_Identify_Group_2A_Cations_and_Group_7A_Anions_(Experiment)When the solubilities of compounds containing various cations combined with a given anion are compared, a solubility trend that follows the order in the periodic table is expected. For example, for th...When the solubilities of compounds containing various cations combined with a given anion are compared, a solubility trend that follows the order in the periodic table is expected. For example, for the solubilities of the sulfate salts, the solubility is expected either to increase or decrease as we go down the alkaline earth family. These solubility properties will be used to identify an unknown compound containing a cation.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/General_Chemistry_Labs/Online_Chemistry_Lab_Manual/Chem_9_Experiments/04%3A_Detection_and_Absorption_of_Ultraviolet_Light_(Experiment)Solar energy (sunlight) contains light we can see, and some we cannot. Visible light has wavelengths of 750 to 400 nm. Ultraviolet (UV) light has shorter wavelengths, cannot be seen, and has higher en...Solar energy (sunlight) contains light we can see, and some we cannot. Visible light has wavelengths of 750 to 400 nm. Ultraviolet (UV) light has shorter wavelengths, cannot be seen, and has higher energy. Infrared (IR) radiation is the major source of heat for Earth. Though UV is a fraction of sunlight, it can be damaging to living organisms. All of these are forms of energy in the electromagnetic spectrum.
- https://chem.libretexts.org/Courses/Minnesota_State_Community_and_Technical_College/CHEM_1111%3A_General_Inorganic_Chemistry_I_Lab_Manual-Online_Section/02%3A_Experiments/2.02%3A_The_Density_of_Liquids_and_Solids_(Experiment)-Home_VersionOBJECTIVES To determine the density of pure water; To determine the density of aluminum (applying the technique of water displacement) and to use this value to determine the thickness of a piece of a...OBJECTIVES To determine the density of pure water; To determine the density of aluminum (applying the technique of water displacement) and to use this value to determine the thickness of a piece of aluminum foil; To measure the mass and volume (via measured dimensions) of several cylinders of an unknown material, and to determine the density of this material via graphical analysis of the collected data.
