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 the sole use by that years of research
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Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor
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Title: Laboratory Techniques and Measurements Purpose: To properly use‚ understand‚ and correctly convert the scientific measurements such as: finding density‚ converting centimeters to millimeters‚ 3 different units of temperature‚ etc… Procedure: I used a metric ruler to measure the length of the objects‚ a thermometer to determine the degrees of the water‚ and a scale to determine the mass of the designated objects. I used the proper equipment to measure out or hold the item. After I gathered
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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 unique design‚ assembly‚ and learning experiences. The laboratory manual included with a LabPaq is intended for the sole use by that LabPaq’s original purchaser and may not be reused without a LabPaq or by others without the specific written consent of HOL. No portion of any LabPaq manual’s materials may be
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recrystallized product was collected. This was low due to the fact that some of the crude product was not recrystallized and was instead used to take a melting point of the crude product. It was also low due to several of the crystals being stuck inside the flask and not going into the funnel. The percent recovery from recrystallization was 54.21%. The melting point of the crude product was 261 - 264°C. The melting point of the recrystallized product was 261 - 263°C. Comparing these values with the literature
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and placed in a pre-weighed 25 mL round bottom flask‚ along with 2.5 mL of glacial acetic acid and a magnetic stir bar. Then the reaction apparatus was assembled‚ the dry tube was charged with conc. sodium bi sulfate‚ the 25 mL round bottom was attached to the apparatus‚ and 5 mL of Br2/HBr mixture was obtained and placed in the round bottom. The reaction took place for 20 minutes. An orange liquid was obtained and placed in a 125 mL Erlenmeyer flask along with 25 mL of water and 2.5 mL of conc
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high surface pressure to move over the land. This causes a small temperature gradient between the ocean surface and the nearby land at night and the wind will blow from the land to the ocean creating the land breeze. Thermos Flask A vacuum flask (also known as a Dewar flask‚ Dewar bottle or Thermos) is an insulating storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask’s surroundings. Invented by Sir
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dissolved it in about 200 ml of distilled water. I made sure to make all of the permanganate dissolve‚ of course‚ by stirring it thoroughly. I then weighed about 2 samples of sodium oxalate (.47 and .50 g) then placed them in some 200-ml Erlenmeyer flasks‚ then and added about 50 ml of distilled water to them as well. I then titrated the potassium permanganate solution after adding about 15 ml of 3 M sulfuric acid to the oxalate and heating the whole solution to about 60-90 C‚ using a magnetic stirring
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V. PRODUCTION ASPECT A. Raw Materials 1. Herbs Number of Units | Raw Materials | Price/Kilo | Total Price | 5 KilosI KiloI KiloI KiloI KiloI KiloI Kilo | Kasitas (Acapulco) NeemPaliahanKalilongMakabuhayMalunggayGuava | Php 25.00 20.00 20.00 20.00 20.00 25.00 20.00 | Php 125.00 20.00 20.00 20.00 20.00 25.00 20.00 | TOTAL
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Procedure 1.Measure about 1g of solid copper. 2.Place Cu in Erlenmeyer flask and place flask under fume hood. 3.Add dropwise 15M HNO3 until solid copper is completely reacted. 4.Place flask in water bath. 5.Add 4M NaOH slowly until no more solid forms. 6.Mix contents by slowly swirling flask. 7.Place flask back in water bath‚ heat to boiling‚ and stir. 8.Heat until separation of solid and solution. 9.Cool flask and allow contents to settle. 10.Decant liquid from solid. 11.Wash solid
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