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Post-Lab Questions 1 In this lab activity, you observed the phenomenon of supercooling. Why does a...
POST LAB QUESTIONS. 1. If you used more water in your calorimeter, would the observed temperature...
POST LAB QUESTIONS. 1. If you used more water in your calorimeter, would the observed temperature change upon the addition of the hot solid object be larger or smaller than the temperature change you observed? Explain. 2. Your instructor handed you a 1-L sample of a liquid and asked you to determine its specific heat. How would you determine the specific heat of the liquid using the equipment in this lab? 3. What effect would not covering the calorimeter cup...
Post lab questions: 1. Draw a cooling curve for water to change the physical state from...
Post lab questions: 1. Draw a cooling curve for water to change the physical state from gaseous phase of water to its solid phase. COS aos-liquid o oxgos-lie condences liquid temperature Solid-liquid 00000 00000 Solid time 2. What is the heat, q, required to melt 10 grams of ice in a) Joules b) calories? a) 9-mXHF 10GX 334 5/4= 33405
Relative Reactivity of Metals and the Activity Series Post Lab Questions You observed the relative reactivity...
Relative Reactivity of Metals and the Activity Series Post Lab Questions You observed the relative reactivity of the following metals. a. Hg reacts with HNO, but not with HCl, hot or cold water. b. Al reacts slowly with hot (100 °C) water. c. Sr reacts with cold water. d. Cd reacts with HCI but not with hot or cold water. Write the mini-activity series (left to right) for these 4 metals (most active on right), least active most active Indicate...
Post Lab Questions Fermentation: 1. What physical property enables one to use distillation for the separation...
Post Lab Questions Fermentation: 1. What physical property enables one to use distillation for the separation of ethyl alcohol enriched from the water mixture? 2 What is an Azeotrope? Explain how can azeotropes be used to purify mixtures? 3. Azeotropes are also defined as liquid mixtures having a vapor pressure at constant temperature, as a function of composition. Explain with your own words why vapor pressure depends on the composition of the mixture. 4 If the distillation temperature is different...
Post-Lab Questions: 1. Why must the permanganate solution be boiled and filtered before titrating? How does...
Post-Lab Questions: 1. Why must the permanganate solution be boiled and filtered before titrating? How does the absence of this step affect the results? 2. What happens if not enough acid was added to the iron solution before the titration was started? 18
POST-LAB QUESTIONS: 1. Give two physical properties you observed in your crude (unpurified) aspirin sample. 2....
POST-LAB QUESTIONS: 1. Give two physical properties you observed in your crude (unpurified) aspirin sample. 2. If the theoretical yield of a reaction was calculated to be 3.11g and the actual yield was 2.65g, what was the percent vield for the reaction? Show formula and all work. 3. If a melting point range is 119.5°C to 125.8°C, what can you say about the sample? (Exp. 11, version 5) Page 9 of 10
Post Lab Questions: CI MALACHITE GREEN CRYSTAL VIOLET 1. Why does the malachite green dye elute...
Post Lab Questions: CI MALACHITE GREEN CRYSTAL VIOLET 1. Why does the malachite green dye elute first? What physical properties does it have that affect it's interaction with alumina and how are those different from crystal violet? 2. Write the reaction of crystal violet with 1 equivalent of HC. 3. Why does adding HCI cause crystal violet to elute more quickly? What changes with it's physical properties and how does that property affect it's interaction with alumina?
Post Lab questions 1. Complete the following reactions and name the products. CH3 -CH=CH2 + CI...
Post Lab questions 1. Complete the following reactions and name the products. CH3 -CH=CH2 + CI + Brz c) CH3 -CH=CH-CH, + HBr - Pt d) CH3 -CH2-CH=CH2 + H 25 °C, I am A Bez 2. Toluene contains a benzene ring with three double bonds in it, but still does not show any signs of undergoing a reaction with bromine solution. Why? 3. Why doesn't cyclohexane decolorize the orange-red color of the bromine or the purple color of KMnO...
9 Pre-Lab Questions 1. Why can you use a calorimeter to study the exchange of heat? EXPERIMENT A ...
9 Pre-Lab Questions 1. Why can you use a calorimeter to study the exchange of heat? EXPERIMENT A calorimeier is a device u s eol to measure hot of roactisn th lainer wn th vr meni o insulated wall's to prevent hret exchange he enviran 2. Why is specific heat an intensive property? energy at o particular temperature 'is the some Its 9uanhhy towhich no physical alimen sian is agsian eof Nomaler heuw mach alaminunh, Is abiliy to aborb heat...
POST LAB QUESTIONS. 1. If you used more water in your calorimeter, would the observed temperature change upon the addition of the hot solid object be larger or smaller than the temperature change you observed? Explain. 2. Your instructor handed you a 1-L sample of a liquid and asked you to determine its specific heat. How would you determine the specific heat of the liquid using the equipment in this lab? 3. What effect would not covering the calorimeter cup...
Post lab questions: 1. Draw a cooling curve for water to change the physical state from gaseous phase of water to its solid phase. COS aos-liquid o oxgos-lie condences liquid temperature Solid-liquid 00000 00000 Solid time 2. What is the heat, q, required to melt 10 grams of ice in a) Joules b) calories? a) 9-mXHF 10GX 334 5/4= 33405
Relative Reactivity of Metals and the Activity Series Post Lab Questions You observed the relative reactivity of the following metals. a. Hg reacts with HNO, but not with HCl, hot or cold water. b. Al reacts slowly with hot (100 °C) water. c. Sr reacts with cold water. d. Cd reacts with HCI but not with hot or cold water. Write the mini-activity series (left to right) for these 4 metals (most active on right), least active most active Indicate...
Post-Lab Questions: 1. Why must the permanganate solution be boiled and filtered before titrating? How does the absence of this step affect the results? 2. What happens if not enough acid was added to the iron solution before the titration was started? 18
POST-LAB QUESTIONS: 1. Give two physical properties you observed in your crude (unpurified) aspirin sample. 2. If the theoretical yield of a reaction was calculated to be 3.11g and the actual yield was 2.65g, what was the percent vield for the reaction? Show formula and all work. 3. If a melting point range is 119.5°C to 125.8°C, what can you say about the sample? (Exp. 11, version 5) Page 9 of 10
Post Lab Questions: CI MALACHITE GREEN CRYSTAL VIOLET 1. Why does the malachite green dye elute first? What physical properties does it have that affect it's interaction with alumina and how are those different from crystal violet? 2. Write the reaction of crystal violet with 1 equivalent of HC. 3. Why does adding HCI cause crystal violet to elute more quickly? What changes with it's physical properties and how does that property affect it's interaction with alumina?
Post Lab questions 1. Complete the following reactions and name the products. CH3 -CH=CH2 + CI + Brz c) CH3 -CH=CH-CH, + HBr - Pt d) CH3 -CH2-CH=CH2 + H 25 °C, I am A Bez 2. Toluene contains a benzene ring with three double bonds in it, but still does not show any signs of undergoing a reaction with bromine solution. Why? 3. Why doesn't cyclohexane decolorize the orange-red color of the bromine or the purple color of KMnO...
9 Pre-Lab Questions 1. Why can you use a calorimeter to study the exchange of heat? EXPERIMENT A calorimeier is a device u s eol to measure hot of roactisn th lainer wn th vr meni o insulated wall's to prevent hret exchange he enviran 2. Why is specific heat an intensive property? energy at o particular temperature 'is the some Its 9uanhhy towhich no physical alimen sian is agsian eof Nomaler heuw mach alaminunh, Is abiliy to aborb heat...
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