Exp1LabRpt- GenChem.pdf - Experiment 1 Report Sheet Basic Laboratory Operations(to be completed AFTER performing the experiment Kendal Miletich Tues

Exp1LabRpt- GenChem.pdf - Experiment 1 Report Sheet Basic...

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Unformatted text preview: Experiment 1 Report Sheet: Basic Laboratory Operations (to be completed AFTER performing the experiment) Kendal Miletich 9/1/2020 Tues, 8:30am Name____________________________ Date______________ Lab Section_____________ (e.g., Tues, 8am) Part C. Practice using the balances Fill in the appropriate data from your notebook: Object Mass of Object (g) Weighing Paper Beaker Test Tube Graduated Cylinder Pipette Bulb .225g 28.773g 5.101g 26.316g 1.928g Part D. Density of an unknown solid Fill in the appropriate data from your notebook: Trial 1 Trial 2 Volume of solid (cm3) 4.820g 5cm^3 5.5cm^3 .5cm^3 Density of solid (g/cm3) 9.64g/cm^3 Tared mass of solid (g) Volume of water (cm3) Volume of water and Solid (cm3) 7 Solid unknown number or letter: __________ Trial 3 (if necessary) 7.770g 9.291g 5cm^3 5cm^3 5.8cm^3 6.1cm^3 .8cm^3 1.1cm^3 9.7125g/cm^3 8.4g/cm^3 9.3g/cm^3 Average density of solid (g/cm3):___________ Bismuth Identity of solid unknown (aluminum, bismuth, copper, or tin): ______________________ In the space below, explain how identified your unknown solid from your experimental density. I had found the density of aluminium, bismuth, copper and tin using the density formula. Then I found which solid was the closest in density to the unkown solid that I had at my lab station. 13 Part E. Density of water Fill in the appropriate data from your notebook: Trial 1 Mass of beaker (g) Mass of beaker and water (g) Mass of liquid (g) Volume of liquid (mL) Density of liquid (g/mL) Trial 2 Trial 3 28.513g 28.516g 28.512g 29.512g 29.501g 29.499g .9990g .9850g .9870g 1mL 1mL 1mL .9990g/mL .9850g/mL .9870g/mL .9903g/mL Average density of water (g/mL):___________ Class Data Water Density (g/mL) Your Group a Group b Group c Data .9903g/mL .9925g/mL .9995g/mL .994g/mL Group d Group e .998g/mL .998g/mL .995g/mL Class average density of water from the six data points above (g/mL):__________ 20 Temperature of Water (°C):_________ .998203g/mL Accepted (theoretical) value of water density (g/mL):_________ 0.3% Percent error of the class data from the six data pts (show calculation below):_________ 1.) Find error -> (experimentally determined value - accepted value) .995g/mL-.998203g/mL = -.003g/mL 2.) Find percent error-> |error in measurement/accepted value| X 100 |-.003/.998203| X 100 = .3% Part F. Volume determination of your micropycnometer On one of the next two pages, explain, in detail, how you determined the volume of your micropycnometer (show all calculations). You can enter text in the box (option 1) or upload an image of your work (option 2). 14 Option 1: Enter your explanation in the box below: What I already know: I know the density of water is .998203g/mL at 20 degrees celcius I know the mass of my micropycnometer is 1.495g I know the mass of my micropycnometer and water combined is 2.996g - So the mass of the water is 1.5010g How I found the volume of my micropycnometer: 1.) I found the mass of my micropycnometer 2.) I added water so it was flush with the top of my micropycnmeter 3.) I took the mass of the water and micropycnometer and subtracted the mass of just the micropycnometer to find the mass of the water 4.) I took the density of water from Table 1.1 in the lab manual for what the tempurature of the room was 5.) I found the volume of my micropycnometer by using the density formula, which is Mass/Volume = Density 1.) I plugged in the information that I already had 1.5010g/V = .998203g/mL 2.) I multiplied both sides by V V X 1.5010g/V = .998203g/mL X V 3.) Then I divided by the density 1.5020g/.998203 = V 4.) The volume of my micropycnometer is 1.504mL Option 2: Upload an image of your explanation in the box below: ...
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