of the specialized underlying structures of these life-forms. In order for us to appreciate these special adaptation‚ we first need to know how a typical plant or an animal cell organelle behaves in different water and solute concentrations. In this lab‚ we will determine the effects of hypertonic‚ isotonic and hypotonic solutions on plant and animal cells. In general when an animals cell’s placed in hypertonic solution it shrivels; a plant cell on the other hand undergoes plasmolysis. When an animal
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Back Laboratory Program SAFETY IN THE CHEMISTRY LABORATORY 786 Pre-Lab Extraction and Filtration 790 1-1 Mixture Separation 792 1-2 Water Purification 794 3-1 Conservation of Mass 798 4-1 Flame Tests 801 Pre-Lab Gravimetric Analysis 828 13-1 Separation of Pen Inks by Paper Chromatography 830 13-2 Colorimetry and Molarity 834 14-1 Testing Water 838 804 7-1 Separation of Salts by Fractional Crystallization 806 7-2 Naming Ionic
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Cheese lab Introduction Scientists work to create new and improved versions of cheese-curdling enzymes‚ as well as to improve the yields and qualities of cheeses. Modern-day cheese makers want to produce large amounts of high-quality cheese in the most economical way. Purpose ▪ Determine which curdling agent produces cheese the fastest. ▪ Determine which curdling agent produces the most cheese. ▪ Examine numerical data to support predictions. ▪ Examine variables that can
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At the beginning of the lab‚ a micro test tube with and without glass wool was weighed on an analytical balance. A watch glass‚ crucible‚ and lid were also weighed. The masses of all the materials needed for the lab were recorded in the data tables of the laboratory notebook. An unknown vial was obtained from the teacher and set to zero on the balance. About 0.6 grams of the unknown was measured into the micro test tube. The analytical balance was set to zero again and then the test tube with the
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Brian Foersch 03/26/15 4.4 - Answer Aristotle Book 1 and 2 Study Questions Hannah Hornung 1. List and briefly describe Aristotle’s three species of rhetoric. (34 points) Deliberative takes place in the assembly. The speaker either advises the audience to do something or warns against something. The audience needs to judge things that are going to happen if they will be good or bad. Judicial is a speech that takes place in front of a court. The speaker either accuses or defends himself or another
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in the proper bubble with a #2 pencil. If you change an answer‚ erase the undesired mark thoroughly. Be sure to fill in the boxes for your student number‚ name and lab section; then correctly fill in the corresponding bubbles beneath them. A periodic table and other useful information are attached to the back of the exam. There are 4 exam pages and 26 questions. Check to be sure you have answered them all! 1. (zero points) Which version of the exam do you have? (a) A (b) B 2. (5 points) Which
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PRE LAB REPORT Reynaldo Riboul TLC and Column Chromatography October 6‚ 2013 Table of Chemicals: Chemical Hazards Mol. Wt. Density Grams Moles Acetone Flammable‚ Irritant 58.08 g mol−1 0.791 g cm−3 2.0 g 0.0344 Hexane Flammable‚ Irritant‚ Dangerous to Environment 86.18 g mol−1 .6548 g mL−1 9.0 g 0.1044 Fluorene Very toxic to aquatic life with long lasting effects 166.223 g/mol 1.202 g/mL 0.3 g 0.00180 Fluorenone Irritant 180.20 g mol−1 1.13 g/cm3 0.3 g 0.00166
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* To determine the molecular weight of a volatile liquid by using Dumas method. METHOD: MATERIAL | CHEMICALS | 125 mL Erlenmeyer flask | Known liquid (2-propanol) | Rubber band | Unknown liquid | Boiling chips | | Watch glass | | 100 mL graduated cylinder | | Pin | | 600 mL beaker | | Hot plate | | Thermometer | | Room temperature water | | 6 × 6 and 8 × 8 aluminium foil | | PROCEDURE: SAFETY * Lab Coat and Safety Goggles. * Keep the bottles tightly
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Effects of different liquids on the elasticity of a rubber band Luke lash and Charles baker Question: If we submerge rubber bands in different liquid substances‚ will its elasticity of the rubber bands increase? Hypothesis: If we use a more acidic substance like vinegar‚ then elasticity of the rubber band will increase. Background: We are conducting this experiment because although it has been done before‚ the substances that have been used before are generally ordinary. Others have used hot
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Digestion Lab Abstract – The purpose of this lab was to understand how different solutions played a role in the digestion protein. By looking at different variables‚ such as temperature‚ and pH we’re capable of understanding just how certain substances functioned and when they didn’t. The data for all labs are clear and concise and give a clear understanding of what solutions work best. All three labs were placed in a warm water bath set at 37’C to stimulate the reaction as if it were taking place
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