liquid. ∆Tf is called the freezing point depression‚ which is the change in freezing point. Tfinal – Tinitial = ∆Tf . The freezing point depression is one of the colligative properties of a solution. Colligative properties include boiling point elevation‚ osmotic pressure‚ and vapor pressure lowering. When considering colligative properties it is easier to work on Molality. Molality is the solute concentration. Molality of A = no. of moles A dissolved/ no. of kg solvent in solution The boiling
Premium Water Freezing-point depression Concentration
Laboratory Techniques and Measurements (adapted from Labpaq Version 09.1.06 by Peter Jeschofnig‚ Ph.D.) Experiment Summary You will have the opportunity to learn how to conduct measurements in mass‚ volume‚ and density using scales and common laboratory equipment. Review the safety materials and wear goggles when working with chemicals. Read the entire exercise before you begin. Take time to organize the materials you will need and set aside a safe workspace in which to complete the exercise
Premium Density Volume Kilogram
textbooks and the LabPaq box or 5-6 thick textbooks. 2. Remove the plunger from the titrator and place it back in your LabPaq box. 3. Attach the stopcock to the tip of the titrator by placing the larger‚ clear‚ plastic end of the stopcock into the tip of the titrator and then twisting the stopcock into place. The stopcock should fit tightly into the titrator‚ so that the liquid will not leak. 4. Stack the textbooks on top of one another or stack two textbooks on top of the LabPaq box. 5. Clamp
Premium Water Water supply Towel
Colligative Properties The Physical Properties of Solutions Colligative Properties • There are 3 colligative or physical properties of solutions that you should know. They are Vapor pressure Boiling point elevation Freezing point depression Osmotic pressure is one you don’t need to worry about. 1. 2. 3. 4. Molality • Molality measures the moles of solute dissolved in the mass (kg) of solvent. • Molality normally expresses concentrations of colloids. • m = moles solute kg solvent
Premium Thermodynamics Water Temperature
amount of solvent is equal. Graph 1 and 5 and Data Table 2 show that the mass of solutes were overall very similar: 8.735 grams of ammonium chloride and 8.99 grams of urea. Overall‚ this experiment proved that the freezing point depression is a colligative property that depends on the number of moles of solute but not on the identity of the solute.
Premium Chemistry Solution Solubility
General College Chemistry LabPaq / Published by: Hands-On Labs‚ Inc. sales@HOLscience.com / www.HOLscience.com / Toll Free 866.206.0773 A Laboratory Manual of Small-Scale Experiments for the Independent Study of General College Chemistry 50-0123-CK-02 LabPaq® is a registered trademark of Hands-On Labs‚ Inc. (HOL). The LabPaq referenced in this manual is produced by Hands-On Labs‚ Inc. which holds and reserves all copyrights on the intellectual properties associated with the LabPaq’s
Premium Chemistry Experiment Units of measurement
What Interaction Of Outside Influence Makes Ice Melt Fastest? A. Explain the significance of the given factors in your project design plan: • Problem statement • Relevance of your testable question Problem Statement: I have lived in a place that during the winter‚ ice would form on the streets and sidewalks and have wondered why things such as salt or sand are used over other methods to help de-ice the surfaces? Why is salt or sand the most commonly used substances when addressing this issue
Premium Chemistry Water Melting point
Biology LabPaq / Published by: Hands-On Labs‚ Inc. sales@HOLscience.com / www.HOLscience.com / Toll Free 866.206.0773 A laboratory Manual of Small-Scale Experiments for the independent Study of general Biology 50-0053-BK-02 LabPaq® is a registered trademark of Hands-On Labs‚ Inc. (HOL). The LabPaq referenced in this manual is produced by Hands-On Labs‚ Inc. which holds and reserves all copyrights on experiences. The laboratory manual included with a LabPaq is intended for the sole use
Premium Cell membrane Bacteria Drinking water
in Pipet 1 Thymol Blue Indicator‚ 0.04% - 0.5 mL in Pipet Experiment procedure: Part I: 1. Prepare an ice water bath by partially filling one of the 50-mL beakers from your LabPaq with tap water and crushed ice. Set aside. 2. Prepare a hot water bath by partially filling the second 50-mL beakers from your LabPaq with very hot tap water. Set aside. 3. Using a 24-well plate add 5 drops of 2.0 M MgCl2‚ magnesium chloride solution to wells C1 and C2. Add 10 drops to wells C3 and C4. 4. Add
Premium Water supply Hydrochloric acid Drinking water
ColleGe Chemistry LabPaq / Published by: Hands-On Labs‚ Inc. sales@HOLscience.com / www.HOLscience.com / Toll Free 866.206.0773 a laboratory manual of small-scale experiments for the independent study of General College Chemistry 50-0125-CK-01 LabPaq® is a registered trademark of Hands-On Labs‚ Inc. (HOL). The LabPaq referenced in this manual is produced by Hands-On Labs‚ Inc. which holds and reserves all copyrights on experiences. The laboratory manual included with a LabPaq is intended for
Premium Sodium chloride Volume Laboratory