The first technique used in today’s lab will use a hot water bath to aid in...
The first technique used in today’s lab will use a hot water bath to aid in finding the boiling point of an unknown liquid. What would be the main issue with this technique in finding the boiling point of n-decane?
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The first technique used in today’s lab will use a hot water
bath to aid in...
A. Recrystallization is an important technique that we used in this lab to purify solids. Answer...
A. Recrystallization is an important technique that we used in this lab to purify solids. Answer the following questions related to this technique, which is outlined in the diagram below. (2 pts. each) Watch ass Watch Glass Hot solvent Insoluble mpurities Dissolve the compound Continue heating if necessary hot solvent Fluted fiter paper Continue heating until half of the solvent is evaporated Vacuum filtration Allowed to cool to room temperature then put in an ice bath HOT Gravity filtration 3....
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...
It's possible to boil water by adding hot rocks to it, a technique that has been...
It's possible to boil water by adding hot rocks to it, a technique that has been used in many societies over time. If you heat a rock in the fire, you can easily get it to a temperature of 500∘C. If you use granite or other similar stones, the specific heat is about 800 J/(kg⋅K). If 5.0 kg of water at 10∘C is in a leak-proof vessel, what minimum number of 1.0 kg stones must be added to bring the...
We used the technique of extraction in this lab. After extraction, what was left in solution?...
We used the technique of extraction in this lab. After extraction, what was left in solution? Why is it acceptable for those chemicals to be left to sit for a week? Think about the possible reactions that would or would not occur during the week? In our extraction, we used NaCl solution. Why did we choose to use that vs. water? In this experiment, we did a Fischer Esterification using excess acetic acid, isopentyl alcohol, and sulfuric acid to form...
QUESTION 1 The procedure for testing your unknown solution in this week's lab is identical to...
QUESTION 1 The procedure for testing your unknown solution in this week's lab is identical to the procedure which you conducted in Week 1. The only difference is, of course, your Unknown Solution may or may not contain all of the ions which you tested for in Week 1. With that being said, please consider the following scenario: You enter the lab and obtain an Unknown Solution from the Stockroom. You begin testing the solution through the steps outlined in...
some of the reagents used in this lab are easily confused: such as persulfate and thiosulfate....
some of the reagents used in this lab are easily confused: such as
persulfate and thiosulfate. A student inadvertently switched these
reagents, adding the persulfate to beaker A and thiosulfate to
beaker b. How would this affect the results? What would the student
observe with respect to the mixture in beaker A?
3. Some of the reagents used in this lab are easily confused: such as persulfate (S.O,2-) and thiosulfate (S,0,2-). A student inadvertently switched these reagents, adding the persulfate...
4. Suppose a hot (89.5°C) piece of copper metal (c = 0.385 g K-') with a...
4. Suppose a hot (89.5°C) piece of copper metal (c = 0.385 g K-') with a mass of 2.55 g is put into 50,0 g of water (c = 4.184Jg-K-'). Calculate the final temperature of the water if its initial temperature is 25.7°C. 5. A fireproof safe is made of two thin metal boxes, one inside the other, with equal spacing be- tween each pair of adjacent surfaces. Calculate the volume between the two boxes given the following dimensions. Include...
What would be the purpose of this lab based on the following information? Colligative Properties II...
What would be the purpose of this lab based on the following information? Colligative Properties II Colligative Property is a property of a solution that depends only on the number of solute molecule present. Osmotic pressure, freezing point depression, boiling point elevation, and vapor pressure lowering are all colligative properties. In today’s lab we will look at three of these properties. Electrolytes are substances that forms ions in solution that conduct electricity. Electrolytes can either be an acid, base or...
hey i really need help for the molality to mass question. the solvent is water and...
hey i really need help for the molality to mass question. the
solvent is water and 100g. SOS!
Table 3: Data obtained for the boiling point elevation simulation. (3 marks) Solute Molality (mol/kg) Solution Boiling Point (°C) NaCl(s) 0.0000 100.00 AT) (°C) 0.0 NaCl(s) 0.1711 NaCl(s) 0.3422 NaCl(s) 0.6844 NaCl(s) 1.3688 CaCl2(s) 0.1711 C12H22011(s) 0.1711 Molality to Mass Sample Calculation: (1 mark) PART 3 BOILING POINT ELEVATION 16. Visit this webpage: https://pages, oregon.edu/tgreenbo/colligative.html; the screenshot (Figure 5) below should be...
16. Would you expect 2-octanone to be soluble in water? Would you expect butanal to be...
16. Would you expect 2-octanone to be soluble in water? Would you expect butanal to be soluble in water? Would either of them be more soluble in hexane than in water? Explain. 25. Criticize the following techniques: isten (a) Heating a mixture that contains n-hexane using an open flame. (b) For a reaction, heating a mixture that contains a large amount of toluene using hot water bath. (c) Running s reaction with tert-butyl alcohol that is cooled to 0°C in...
A. Recrystallization is an important technique that we used in this lab to purify solids. Answer the following questions related to this technique, which is outlined in the diagram below. (2 pts. each) Watch ass Watch Glass Hot solvent Insoluble mpurities Dissolve the compound Continue heating if necessary hot solvent Fluted fiter paper Continue heating until half of the solvent is evaporated Vacuum filtration Allowed to cool to room temperature then put in an ice bath HOT Gravity filtration 3....
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...
QUESTION 1 The procedure for testing your unknown solution in this week's lab is identical to the procedure which you conducted in Week 1. The only difference is, of course, your Unknown Solution may or may not contain all of the ions which you tested for in Week 1. With that being said, please consider the following scenario: You enter the lab and obtain an Unknown Solution from the Stockroom. You begin testing the solution through the steps outlined in...
some of the reagents used in this lab are easily confused: such as
persulfate and thiosulfate. A student inadvertently switched these
reagents, adding the persulfate to beaker A and thiosulfate to
beaker b. How would this affect the results? What would the student
observe with respect to the mixture in beaker A?
3. Some of the reagents used in this lab are easily confused: such as persulfate (S.O,2-) and thiosulfate (S,0,2-). A student inadvertently switched these reagents, adding the persulfate...
4. Suppose a hot (89.5°C) piece of copper metal (c = 0.385 g K-') with a mass of 2.55 g is put into 50,0 g of water (c = 4.184Jg-K-'). Calculate the final temperature of the water if its initial temperature is 25.7°C. 5. A fireproof safe is made of two thin metal boxes, one inside the other, with equal spacing be- tween each pair of adjacent surfaces. Calculate the volume between the two boxes given the following dimensions. Include...
hey i really need help for the molality to mass question. the
solvent is water and 100g. SOS!
Table 3: Data obtained for the boiling point elevation simulation. (3 marks) Solute Molality (mol/kg) Solution Boiling Point (°C) NaCl(s) 0.0000 100.00 AT) (°C) 0.0 NaCl(s) 0.1711 NaCl(s) 0.3422 NaCl(s) 0.6844 NaCl(s) 1.3688 CaCl2(s) 0.1711 C12H22011(s) 0.1711 Molality to Mass Sample Calculation: (1 mark) PART 3 BOILING POINT ELEVATION 16. Visit this webpage: https://pages, oregon.edu/tgreenbo/colligative.html; the screenshot (Figure 5) below should be...
16. Would you expect 2-octanone to be soluble in water? Would you expect butanal to be soluble in water? Would either of them be more soluble in hexane than in water? Explain. 25. Criticize the following techniques: isten (a) Heating a mixture that contains n-hexane using an open flame. (b) For a reaction, heating a mixture that contains a large amount of toluene using hot water bath. (c) Running s reaction with tert-butyl alcohol that is cooled to 0°C in...
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