If you started this experiment with 4.75 grams of tea leaves, what would the theoretical yield...
If you started this experiment with 4.75 grams of tea leaves, what would the theoretical yield of caffeine be assuming the mass percent of caffeine in tea leaves is the same as in Question 5?
The mass percent of tea leaves in Question 5 was 5%.
Homework Answers
The theoretical yield of caffeine = mass % of caffeine / 100 * Mass of tea leaves = 5/100 * 4.75 = 0.238 g
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If you started this experiment with 4.75 grams of tea leaves,
what would the theoretical yield...
Organic 6. You isolated 1.43 grams of caffeine from 10 tea bags. If each tea bag...
Organic
6. You isolated 1.43 grams of caffeine from 10 tea bags. If each tea bag weighs grams, what is the percent yield caffeine in the tea. If the density of a certain liquid material is 1.27 g/ml, calculate the volume of the material that would be equivalent to 10 grams of the materials. 7.
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geam 0.0353 02 Results Weight of tea extracted Weight of crystalizeled0ogeomS 2 bus% Percent recovery of...
geam 0.0353 02 Results Weight of tea extracted Weight of crystalizeled0ogeomS 2 bus% Percent recovery of caffeine from tea Describe the a crystallized caffeine Post Lab Questions Tea contains approximately 2% caffeine by weight. Assuming that you started with 18 g of tea leaves, calculate your percent yield. 2. If the density of the organic layer is unknown, what could you do to answer the question, "which layer is the water layer"?
2. When using the separatory funnel you may have observed a oily emulsion between the aqueous and...
2. When using the separatory funnel you may have observed a oily emulsion between the aqueous and DCM layers. What components of tea are responsible for this emulsion? How can one minimize the size of the emulsion layer? 3. How does adding the anhydrous sodium sulfate to the dichloromethane solution remove water? 4. If the above step was omitted in the isolation procedure, how would this be reflected in the yield of caffeine? 5. A student used 8.23 g of...
experiment-2-coffeine-extraction-l.pdf
Introduction: Pre-lab Questions Turn in typed responses in the beginning of lab. Answer in complete sentences. Show your work in pen where applicable. 1. What other compounds are extracted along with caffeine into the tea? Use what you know about the relative polarity of the functional groups within these compounds to determine the final destination of the following compounds: cellulose, tannins, chlorophylls, sodium carbonate. Do the majority of these compounds end up in the tea bag, filtered solid, aqueous layer,...
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yucur 10 10 POINTS) If the theoretical yield of aceitic acid in a certain experiment is 21.4 grams and the actual iled is 19.1 grams, what is the percent yield? O 89.3% 111% O 10.7% 12.0%
Organic chemistry d 1.43 grams of caffeine from 10 tea bags. If each tea bag weighs...
Organic chemistry
d 1.43 grams of caffeine from 10 tea bags. If each tea bag weighs 3.3 grams, what is the percent yield caffeine in the tea. 7. If the density of a certain liquid material is 1.27 gyml, caleulate the volume of the material that would be equivalent to 10 grams of the materials. The melting point of a pure compound is known to be 110-111°. Describe the melting behavior expected if this compound is contaminated with a 10...
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Question 3 3 pts What is the theoretical yield for CO2 in cellular respiration below if...
Question 3 3 pts What is the theoretical yield for CO2 in cellular respiration below if you start with 125 grams of CH2O, and excess oxygen? CH2206+602 -->600, +6H,0 Molar Mass of CO, 44,01 g/mol Molar Mass of C,H,O. 180.18 g/mol Question 4 3 pts What is the percent yield for a reaction that actually makes 245g and had a theoretical yield of 33.0g? xewa
What is the theoretical yield (in grams) and percent yield of your triphenylmethanol product in this...
What is the theoretical yield (in grams) and percent yield of your triphenylmethanol product in this experiment? Assume you have collected 0.15 g of triphenylmethanol. Br 2 Mg Ether MgBr 1) PhCO2CH3 2) HCI 2 2 Ph3COH + CH3OH Figure 10.1. The stoichiometry of a Grignard reaction. Br MgBr 2 1) 2 Mg Ether 2 2) PhCO2CH3 i MgBr OCH3 Ph Ph Ph CH30 + Benzophenone, III II Ph - MgBr OH MgBr 3) HCI Ph Ph Ph Ph Ph...
Organic
6. You isolated 1.43 grams of caffeine from 10 tea bags. If each tea bag weighs grams, what is the percent yield caffeine in the tea. If the density of a certain liquid material is 1.27 g/ml, calculate the volume of the material that would be equivalent to 10 grams of the materials. 7.
geam 0.0353 02 Results Weight of tea extracted Weight of crystalizeled0ogeomS 2 bus% Percent recovery of caffeine from tea Describe the a crystallized caffeine Post Lab Questions Tea contains approximately 2% caffeine by weight. Assuming that you started with 18 g of tea leaves, calculate your percent yield. 2. If the density of the organic layer is unknown, what could you do to answer the question, "which layer is the water layer"?
2. When using the separatory funnel you may have observed a oily emulsion between the aqueous and DCM layers. What components of tea are responsible for this emulsion? How can one minimize the size of the emulsion layer? 3. How does adding the anhydrous sodium sulfate to the dichloromethane solution remove water? 4. If the above step was omitted in the isolation procedure, how would this be reflected in the yield of caffeine? 5. A student used 8.23 g of...
yucur 10 10 POINTS) If the theoretical yield of aceitic acid in a certain experiment is 21.4 grams and the actual iled is 19.1 grams, what is the percent yield? O 89.3% 111% O 10.7% 12.0%
Organic chemistry
d 1.43 grams of caffeine from 10 tea bags. If each tea bag weighs 3.3 grams, what is the percent yield caffeine in the tea. 7. If the density of a certain liquid material is 1.27 gyml, caleulate the volume of the material that would be equivalent to 10 grams of the materials. The melting point of a pure compound is known to be 110-111°. Describe the melting behavior expected if this compound is contaminated with a 10...
Question 3 3 pts What is the theoretical yield for CO2 in cellular respiration below if you start with 125 grams of CH2O, and excess oxygen? CH2206+602 -->600, +6H,0 Molar Mass of CO, 44,01 g/mol Molar Mass of C,H,O. 180.18 g/mol Question 4 3 pts What is the percent yield for a reaction that actually makes 245g and had a theoretical yield of 33.0g? xewa
What is the theoretical yield (in grams) and percent yield of your triphenylmethanol product in this experiment? Assume you have collected 0.15 g of triphenylmethanol. Br 2 Mg Ether MgBr 1) PhCO2CH3 2) HCI 2 2 Ph3COH + CH3OH Figure 10.1. The stoichiometry of a Grignard reaction. Br MgBr 2 1) 2 Mg Ether 2 2) PhCO2CH3 i MgBr OCH3 Ph Ph Ph CH30 + Benzophenone, III II Ph - MgBr OH MgBr 3) HCI Ph Ph Ph Ph Ph...
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