during the procedure. It was possible to distinguish between physical and chemical changes using scientific observations. Experiment and Observation Please note that this procedure was adapted from the “Observation of Chemical and Physical Changes” LabPaq Lab manual (Hands-On Labs Version 42-01-82-00-03‚ 2015) Table 1 Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO3 (Sodium Bicarbonate) HCl (Hydrochloric Acid) Bubbles‚ no change in color‚ clear‚ Y A2 NaOCl
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Name: Exp 9: Stoichiometry of a Precipitation Reaction Data Tables: Step 3: Show the calculation of the needed amount of Na2CO3 CaCl2.H2O(aq)= m/M =1/147 =0.0068 mol CaCO3(s)=0.0068*1/1 =0.0068 mol CaCO3 (s)= CaCO3 mol *CaCO3 g =0.0068 mol*100.01 g =0.68 g Convert moles of Na-2CO3 to grams of Na2CO3 = 0.00680 moles Na-2CO3 x 105.99g Na-2CO3 1 mole Na-2CO3 = 0.72g 0.72g of Na-2CO3 to fully react with 1g of CaCl2-.2H2O Step 4: Mass of weighing dish
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To provide an understanding of the concept of friction‚ and To calculate the coefficient of friction of an object by two methods. Materials From: Label or Box/Bag: Student Provides Qty Item Description: 1 1 1 1 1 1 1 From LabPaq Ramp board: 3 - 4 feet long‚ 10 cm wide Can of soft drink or item of similar weight Friction block set-PK Protractor Scale-Spring-500-g Tape measure‚ 1.5-m Tape measure‚ 3-m Discussion and Review Whenever a body slides along another body
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References: ACID_BASE INDICATORS. (n.d.). ChemLib. Retrieved May 27‚ 2013‚ from http://www.ch.ic.ac.uk/vchemlib/course/indi/indicator.html LabPaq. A Laboratory Manual of Small-Scale Experiments for the Independent Study of General College Chemistry. (2013). Englewood: Hands-On Labs‚ Inc..
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References: 1. Hands-on Labs‚ Inc. LabPaQ CK-College General Chemistry. Observation of Chemical Changes. Pgs 15-20. Englewood‚ CO. USA.
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Keith Shearer Lab Group 3 January 19‚ 2015 Objective Is to measure various food items and become familiar with different energy units like calories and joules. Also‚ we will be using simple household products and follow the standard safety procedures of this lab. Materials Procedure First‚ use a digital scale to determine the empty weight of the 100ml beaker. The‚ you are going to fill the beaker half way with water (approximately 50ml) and weigh it again. Take the water and beaker weight
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to identify them. Materials: Matches Toothpicks Pie tin Marker White Vinegar Hydrogen peroxide Measuring spoons Straw Tissue paper Baking soda Test tubes 24 Well Plate Pipet Stoppers for the test tube Chemicals provided by Labpaq Procedure: Place a piece of mossy zinc in the test tube that contains diluted HCl. Cap the tube with the stopper that has the gas delivery tube through the center of it. Stand it up straight in the well plate‚ using the tissue paper if necessary
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uncertainty. Name of author: Matthew Martin Date and time experiment was performed: 03/02/2011 12:00pm Course Name/Number: PHYS-171-DL1 Equipment and Material used: Pen and pencils Paper‚ plain and graph Computer and spreadsheet program No LabPaq supplies are required for this experiment. Data: The data table (Lab Manual‚ p. 55) that follows shows data taken in a free-fall experiment. Measurements were made of the distance of the fall (Y) at each of the four precisely measured times
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Experiment One: Laboratory Techniques and Measurements Objectives: 1. To apply basic knowledge regarding the measurement of mass‚ length‚ volume‚ temperature‚ and density 2. Learning to identify and use tools provided within the labpaq kit 3. Becoming familiar with common lab tools used in Chemistry Observations: While participating in experiment 1‚ I was able to become familiar with my new lab kit. I observed how to weigh and measure objects as well as record those findings in an organized
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Zn(NO3)2 into well A3 of the 24-well plate. 5. Place 10 drops of Iron (III) chloride‚ FeCl3 into well A4 of the 24-well plate. 6. Place 10 drops of Copper (II) sulfate‚ Cu SO4 into well A5 of the 24-well plate. 7. Take the metal solids from your LabPaq 8. Use your tweezers to pick up and carefully insert the piece of magnesium into the sodium sulfate. Record your observations. 9. Carefully insert a piece of zinc into the magnesium sulfate. Record your observations. 10. Carefully insert a piece
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