14. Your thermometer, when calibrated reads 102˚C in boiling water and -1˚C in an ice bath....
14. Your thermometer, when calibrated reads 102˚C in boiling water and -1˚C in an ice bath. Explain how you would correct for your thermometer’s inaccuracy in each of the following cases.
a. You wish to concentrate a sucrose solution so that it boils at 110˚C.
b. You wish to record the correct boiling point of a liquid that boils when your thermometer reads 96˚C.
c. You wish to record the correct freezing point of a solution that freezes when your thermometer reads -5˚C.
Homework Answers
Hi bloke,
Very sorry i am unable to solve part b of your question. Sincerely saying i don't know exactly hoe to solve. Please rate my part a and part c. Very sorry again.
Thanks
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14. Your thermometer, when calibrated reads 102˚C in
boiling water and -1˚C in an ice bath....
A platinum resistance thermometer has a resistance of 200 Ω when placed in an ice 0◦C...
A platinum resistance thermometer has a resistance of 200 Ω when placed in an ice 0◦C bath and 232.6 Ω when immersed in a crucible containing a melting substance. What is the melting point of the substance? The temperature coefficient of the platinum is 0.00392 (◦C)−1 . The resistor was calibrated at a temperature of 20◦C. Answer in units of ◦C.
A platinum resistance thermometer has a resistance of 200 Ω when placed in an ice 0◦C...
A platinum resistance thermometer has a resistance of 200 Ω when placed in an ice 0◦C bath and 204.7 Ω when immersed in a crucible containing a melting substance. What is the melting point of the substance? The temperature coefficient of the platinum is 0.00392 (◦C)−1 . The resistor was calibrated at a temperature of 20◦C. Answer in units of ◦C.
8. What is the final boiling point of a 1.25 molal solution of sugar in water?...
8. What is the final boiling point of a 1.25 molal solution of sugar in water? The Kb for water is 0.512 C/m. (For sugar i = l.) 9. A solution was prepared by dissolving 0.52 mol hexane into 400g CCl4. What is the change in freezing point of this solution? Carbon tetrachloride has a freezing point depression constant of 29.8 Cm,and freezes at-23。. 10. A solution was prepared by dissolving 0.26 moles of ethanol (C2HsOH) into 750g Diethyl ether....
A special mercury thermometer which reads in Celsius has a distance of 8.3 mm between each...
A special mercury thermometer which reads in Celsius has a distance of 8.3 mm between each degree marking (for example: from 2°C to 3° is 8.3 mm). If the temperature in the morning was 62 °F and the temperature later on around lunch time was 92°F, how many mm did the level of the liquid travel up the thermometer? The sucrose (C12H22011) in sugarcane can react with with water to produce ethanol (C2H,O) and carbon dioxide. In this way, sugarcane...
The normal freezing point of a certain liquid X is 4.1 C , but when 27.84...
The normal freezing point of a certain liquid X is 4.1 C , but when 27.84 g of urea ((NH2)2CO) are dissolved in 750 g of X , it is found that the solution freezes at -0.7 C instead. Use this information to calculate the molal freezing point depression constant Kf of X . Be sure your answer has the correct number of significant digits
8. The normal freezing point of a certain liquid X is 0.7 °C, but when 15....
8. The normal freezing point of a certain liquid X is 0.7 °C, but when 15. g of urea, (NH2)2CO, are dissolved in 250. g of X, it is found that the solution freezes at -5.8 °C instead. Use this information to calculate the molal freezing point depression constant Kr of X. Be sure your answer has the correct number of significant digits.
1. What is the boiling point of a 3.0 m Ca(NO3)2 solution in water? Where: the...
1. What is the boiling point of a 3.0 m Ca(NO3)2 solution in water? Where: the change in boiling point (ΔTb) = mKb m is the molality of the solution Kb (the boiling point constant) for water is 0.512 2. The freezing point of ethanol (C2H5OH) is -114.6 °C. What is the freezing point (°C) of a solution prepared by dissolving 50.0 g of glycerin a nonelectrolyte) in 200.0 g of ethanol? Where: ΔTf = mKf The molal freezing point depression...
The normal freezing point of a certain liquid X is 6.60 °C, but when 27. g...
The normal freezing point of a certain liquid X is 6.60 °C, but when 27. g of potassium bromide (KBr) are dissolved in 300. g of X the solution freezes at 4.9 °C instead. Use this information to calculate the molal freezing point depression constant K, of X. Be sure your answer is rounded to the correct number of significiant digits. Ķ, = 0 °C kg x s ?
7. If a 3.0 M solution of glucose (C H202), a 2.0 M solution of Na...
7. If a 3.0 M solution of glucose (C H202), a 2.0 M solution of Na SO, and a 1.0 M solution of (NH4)3PO4, is made, which solution will have the lowest vapor pressure, highest boiling point, and lowest freezing point? 10. Consider the structures for benzophenone and cyclohexanone shown as follows benzophenone cyclohexanone a) Are all the atoms in the same plane in the cyclohexanone? anone is b) Explain why benzophenone is a solid at room temperature and why...
2. Three students from your lab have to determine a boiling point of an unknown sample...
2. Three students from your lab have to determine a boiling point of an unknown sample that is supposed to be butanone (Bp.-80°C). Although, all three students have conducted their experiment eorrectly, they came up withe different values: 79°C, 84°C and 75°C. a)Explain what could have beon the source of crror if the sample given to the students is a pure sample and student carried out their measurements properly. b) Propose a solution to correct these diverging data if you...
8. What is the final boiling point of a 1.25 molal solution of sugar in water? The Kb for water is 0.512 C/m. (For sugar i = l.) 9. A solution was prepared by dissolving 0.52 mol hexane into 400g CCl4. What is the change in freezing point of this solution? Carbon tetrachloride has a freezing point depression constant of 29.8 Cm,and freezes at-23。. 10. A solution was prepared by dissolving 0.26 moles of ethanol (C2HsOH) into 750g Diethyl ether....
A special mercury thermometer which reads in Celsius has a distance of 8.3 mm between each degree marking (for example: from 2°C to 3° is 8.3 mm). If the temperature in the morning was 62 °F and the temperature later on around lunch time was 92°F, how many mm did the level of the liquid travel up the thermometer? The sucrose (C12H22011) in sugarcane can react with with water to produce ethanol (C2H,O) and carbon dioxide. In this way, sugarcane...
8. The normal freezing point of a certain liquid X is 0.7 °C, but when 15. g of urea, (NH2)2CO, are dissolved in 250. g of X, it is found that the solution freezes at -5.8 °C instead. Use this information to calculate the molal freezing point depression constant Kr of X. Be sure your answer has the correct number of significant digits.
The normal freezing point of a certain liquid X is 6.60 °C, but when 27. g of potassium bromide (KBr) are dissolved in 300. g of X the solution freezes at 4.9 °C instead. Use this information to calculate the molal freezing point depression constant K, of X. Be sure your answer is rounded to the correct number of significiant digits. Ķ, = 0 °C kg x s ?
7. If a 3.0 M solution of glucose (C H202), a 2.0 M solution of Na SO, and a 1.0 M solution of (NH4)3PO4, is made, which solution will have the lowest vapor pressure, highest boiling point, and lowest freezing point? 10. Consider the structures for benzophenone and cyclohexanone shown as follows benzophenone cyclohexanone a) Are all the atoms in the same plane in the cyclohexanone? anone is b) Explain why benzophenone is a solid at room temperature and why...
2. Three students from your lab have to determine a boiling point of an unknown sample that is supposed to be butanone (Bp.-80°C). Although, all three students have conducted their experiment eorrectly, they came up withe different values: 79°C, 84°C and 75°C. a)Explain what could have beon the source of crror if the sample given to the students is a pure sample and student carried out their measurements properly. b) Propose a solution to correct these diverging data if you...
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