It is 25 degrees at room temperature. Our teacher asked rigorous. I said that it was insoluble. As a result, I was approved. I asked me to check the specific value and calculate the specific dissolved amount.It is difficult, except for the analysis of the 0.3%water dissolving part of the pure ethanol, I can't think of other methods.
It is 25 degrees at room temperature. Our teacher asked rigorous. I said that it was insoluble. As a result, I was approved. I asked me to check the specific value and calculate the specific dissolved amount.It is difficult, except for the analysis of the 0.3%water dissolving part of the pure ethanol, I can't think of other methods.
\u0026 nbsp; \u0026 nbsp; I don't quite understand the next few sentences.I wonder if the 6th floor is said to be sodium hydroxide. Sodium hydroxide is soluble in ethanol. It can indeed be sodium hydroxide.I want to know the situation of calcium hydroxide.Thanks!
\u0026 nbsp; \u0026 nbsp; I don't quite understand the next few sentences.I wonder if the 6th floor is said to be sodium hydroxide. Sodium hydroxide is soluble in ethanol. It can indeed be sodium hydroxide.I want to know the situation of calcium hydroxide.Thanks!
It is really insoluble, then you can calculate it.Pure, 99.7%of the content, general analysis is pure, water -free ethanol reaches 100%too difficult.Organic is not checked, and it is unlikely that there is a little possibility.
It is really insoluble, then you can calculate it.Pure, 99.7%of the content, general analysis is pure, water -free ethanol reaches 100%too difficult.Organic is not checked, and it is unlikely that there is a little possibility.
\u0026 nbsp; \u0026 nbsp; According to my understanding of chromatography, chromatography generally detects organic matter.Among them, the gas spectrum can only measure organic matter that can only measure the boiling point and is not easy to decompose because the carrier is the gas. The liquid spectrum is much better, and the range of analysis is wide.However, there are not many analysis of inorganic objects. Most of them are limited to halogen elements and their compounds. Therefore, it is difficult to analyze the material estimation of the substance with metal ions.
\u0026 nbsp; \u0026 nbsp; According to my understanding of chromatography, chromatography generally detects organic matter.Among them, the gas spectrum can only measure organic matter that can only measure the boiling point and is not easy to decompose because the carrier is the gas. The liquid spectrum is much better, and the range of analysis is wide.However, there are not many analysis of inorganic objects. Most of them are limited to halogen elements and their compounds. Therefore, it is difficult to analyze the material estimation of the substance with metal ions.
\u0026 nbsp; \u0026 nbsp; thank you!I thought about insoluble in ethanol, and the instructor asked me to give me a specific solubility value. It was very difficult.
\u0026 nbsp; \u0026 nbsp; thank you!I thought about insoluble in ethanol, and the instructor asked me to give me a specific solubility value. It was very difficult.
This can be dissolved. This can be used as a detergent to use \u0026 nbsp; \u0026 nbsp; you can use a water bath pot to pretend to be controlled at 80 degrees.It's very simple to ensure the volatilization of ethanol
This can be dissolved. This can be used as a detergent to use \u0026 nbsp; \u0026 nbsp; you can use a water bath pot to pretend to be controlled at 80 degrees.It's very simple to ensure the volatilization of ethanol
\u0026 nbsp; \u0026 nbsp; this is not easy to handle.It should be really insoluble at all times.Water -free ethanol contains three thousandths of water?So did not provide a dissolved data of calcium hydroxide at 25 degrees in the water. Just count it as it is.100 grams of water -free ethanol contains 0.3 grams of water, and 0.3 grams of water can dissolve calcium hydroxide 0.3/100*0.155 \u003d 0.000465g/per 100g water -free ethanol.This solution is for reference only. It really doesn't work, do you check the organic chemistry book?I remember when talking about the accumulation, there is data in the water, but it is difficult to say whether there is any relevant data in the water -free ethanol
\u0026 nbsp; \u0026 nbsp; this is not easy to handle.It should be really insoluble at all times.Water -free ethanol contains three thousandths of water?So did not provide a dissolved data of calcium hydroxide at 25 degrees in the water. Just count it as it is.100 grams of water -free ethanol contains 0.3 grams of water, and 0.3 grams of water can dissolve calcium hydroxide 0.3/100*0.155 \u003d 0.000465g/per 100g water -free ethanol.This solution is for reference only. It really doesn't work, do you check the organic chemistry book?I remember when talking about the accumulation, there is data in the water, but it is difficult to say whether there is any relevant data in the water -free ethanol
\u0026 nbsp; \u0026 nbsp;The method of chromatography may be a bit difficult, because my understanding of the chromatography seems to be impossible to peak the peak of inorganic objects.Because the chromatography itself has restrictions on the temperature requirements, it is almost impossible to use calcium hydroxide at restricted temperatures, so the general chromatography is used to analyze organic matter.I really do n’t understand the method of solubility accumulation. It ’s been several years since I left books and experiments, haha.However, I know the atomic absorption and ICP can do trace analysis. These two methods should be fine.Just now, I didn't respond for a while.
\u0026 nbsp; \u0026 nbsp;The method of chromatography may be a bit difficult, because my understanding of the chromatography seems to be impossible to peak the peak of inorganic objects.Because the chromatography itself has restrictions on the temperature requirements, it is almost impossible to use calcium hydroxide at restricted temperatures, so the general chromatography is used to analyze organic matter.I really do n’t understand the method of solubility accumulation. It ’s been several years since I left books and experiments, haha.However, I know the atomic absorption and ICP can do trace analysis. These two methods should be fine.Just now, I didn't respond for a while.
\u0026 nbsp; \u0026 nbsp;At that time, I will announce the data.It is hoped that someone has done it, because my sample is mainly calcium hydroxide, more than 80%, and some more difficult substances than calcium hydroxide can be ignored.
\u0026 nbsp; \u0026 nbsp;At that time, I will announce the data.It is hoped that someone has done it, because my sample is mainly calcium hydroxide, more than 80%, and some more difficult substances than calcium hydroxide can be ignored.
\u0026 nbsp; \u0026 nbsp; polite.It is mainly learning to come to Haichuan. Services are just sidelines.You can learn quite a lot of professional knowledge here, and I also wish you a full load.
\u0026 nbsp; \u0026 nbsp; polite.It is mainly learning to come to Haichuan. Services are just sidelines.You can learn quite a lot of professional knowledge here, and I also wish you a full load.
\u0026 nbsp; \u0026 nbsp; atomic light absorption light method should be no problem, we once measured the aquatic solutionCalcium ion concentration and high accuracy.The chromatography does not know well, it should be okay.Is the chromatographic calcium hydroxide gasification, and calcium hydroxide in it should exist in particles.The solubility accumulation is the test question in materialization.
\u0026 nbsp; \u0026 nbsp; atomic light absorption light method should be no problem, we once measured the aquatic solutionCalcium ion concentration and high accuracy.The chromatography does not know well, it should be okay.Is the chromatographic calcium hydroxide gasification, and calcium hydroxide in it should exist in particles.The solubility accumulation is the test question in materialization.
\u0026 nbsp; \u0026 nbsp; Since it is almost insoluble, the visual inspection must not, refer to the conventional solubility measurement method.The amount of dissolution can almost ignore the measurement.You can't see a method. You can't see it. The chromatography method is used to detect the concentration of calcium ions in the ethanol after saturated, and then calculate the solubility.Or you can refer to the measurement of the solubility of insoluble items such as silver chloride, such as measuring solubility accumulation,
\u0026 nbsp; \u0026 nbsp; Since it is almost insoluble, the visual inspection must not, refer to the conventional solubility measurement method.The amount of dissolution can almost ignore the measurement.You can't see a method. You can't see it. The chromatography method is used to detect the concentration of calcium ions in the ethanol after saturated, and then calculate the solubility.Or you can refer to the measurement of the solubility of insoluble items such as silver chloride, such as measuring solubility accumulation,
\u0026 nbsp; \u0026 nbsp; basically insoluble at room temperature.In addition, can this be done?Is it dissolved in visual inspection?I really do n’t understand this, there is a way to talk about it, communicate
\u0026 nbsp; \u0026 nbsp; basically insoluble at room temperature.In addition, can this be done?Is it dissolved in visual inspection?I really do n’t understand this, there is a way to talk about it, communicate
\u0026 nbsp; \u0026 nbsp;If the granularity of calcium oxide will be dissolved with deodorizing water, the measurement result will not make sense (unable to measure the dry method). If you want to use ethanol, you must know the solubility in the ethanol.
\u0026 nbsp; \u0026 nbsp;If the granularity of calcium oxide will be dissolved with deodorizing water, the measurement result will not make sense (unable to measure the dry method). If you want to use ethanol, you must know the solubility in the ethanol.
Okay, thank you!
Okay, thank you!
VOTE
Reply 5# kaminocmyhc
It is 25 degrees at room temperature. Our teacher asked rigorous. I said that it was insoluble. As a result, I was approved. I asked me to check the specific value and calculate the specific dissolved amount.It is difficult, except for the analysis of the 0.3%water dissolving part of the pure ethanol, I can't think of other methods.
Reply 5# kaminocmyhc
It is 25 degrees at room temperature. Our teacher asked rigorous. I said that it was insoluble. As a result, I was approved. I asked me to check the specific value and calculate the specific dissolved amount.It is difficult, except for the analysis of the 0.3%water dissolving part of the pure ethanol, I can't think of other methods.
VOTE
\u0026 nbsp; \u0026 nbsp; Although I have found this online, I still want to thank you!Thanks!
\u0026 nbsp; \u0026 nbsp; Although I have found this online, I still want to thank you!Thanks!
VOTE
\u0026 nbsp; \u0026 nbsp; I don't quite understand the next few sentences.I wonder if the 6th floor is said to be sodium hydroxide. Sodium hydroxide is soluble in ethanol. It can indeed be sodium hydroxide.I want to know the situation of calcium hydroxide.Thanks!
\u0026 nbsp; \u0026 nbsp; I don't quite understand the next few sentences.I wonder if the 6th floor is said to be sodium hydroxide. Sodium hydroxide is soluble in ethanol. It can indeed be sodium hydroxide.I want to know the situation of calcium hydroxide.Thanks!
VOTE
It is really insoluble, then you can calculate it.Pure, 99.7%of the content, general analysis is pure, water -free ethanol reaches 100%too difficult.Organic is not checked, and it is unlikely that there is a little possibility.
It is really insoluble, then you can calculate it.Pure, 99.7%of the content, general analysis is pure, water -free ethanol reaches 100%too difficult.Organic is not checked, and it is unlikely that there is a little possibility.
VOTE
\u0026 nbsp; \u0026 nbsp; According to my understanding of chromatography, chromatography generally detects organic matter.Among them, the gas spectrum can only measure organic matter that can only measure the boiling point and is not easy to decompose because the carrier is the gas. The liquid spectrum is much better, and the range of analysis is wide.However, there are not many analysis of inorganic objects. Most of them are limited to halogen elements and their compounds. Therefore, it is difficult to analyze the material estimation of the substance with metal ions.
\u0026 nbsp; \u0026 nbsp; According to my understanding of chromatography, chromatography generally detects organic matter.Among them, the gas spectrum can only measure organic matter that can only measure the boiling point and is not easy to decompose because the carrier is the gas. The liquid spectrum is much better, and the range of analysis is wide.However, there are not many analysis of inorganic objects. Most of them are limited to halogen elements and their compounds. Therefore, it is difficult to analyze the material estimation of the substance with metal ions.
VOTE
\u0026 nbsp; \u0026 nbsp; thank you!I thought about insoluble in ethanol, and the instructor asked me to give me a specific solubility value. It was very difficult.
\u0026 nbsp; \u0026 nbsp; thank you!I thought about insoluble in ethanol, and the instructor asked me to give me a specific solubility value. It was very difficult.
VOTE
VOTE
Admire your spirit, although very busy, still dedicated a lot of time on the forum,thank you!
Admire your spirit, although very busy, still dedicated a lot of time on the forum,thank you!
VOTE
\u0026 nbsp; \u0026 nbsp;
\u0026 nbsp; \u0026 nbsp;
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Reply 11# lzk010
\u0026 nbsp; \u0026 nbsp; this is not easy to handle.It should be really insoluble at all times.Water -free ethanol contains three thousandths of water?So did not provide a dissolved data of calcium hydroxide at 25 degrees in the water. Just count it as it is.100 grams of water -free ethanol contains 0.3 grams of water, and 0.3 grams of water can dissolve calcium hydroxide 0.3/100*0.155 \u003d 0.000465g/per 100g water -free ethanol.This solution is for reference only.
It really doesn't work, do you check the organic chemistry book?I remember when talking about the accumulation, there is data in the water, but it is difficult to say whether there is any relevant data in the water -free ethanol
Reply 11# lzk010
\u0026 nbsp; \u0026 nbsp; this is not easy to handle.It should be really insoluble at all times.Water -free ethanol contains three thousandths of water?So did not provide a dissolved data of calcium hydroxide at 25 degrees in the water. Just count it as it is.100 grams of water -free ethanol contains 0.3 grams of water, and 0.3 grams of water can dissolve calcium hydroxide 0.3/100*0.155 \u003d 0.000465g/per 100g water -free ethanol.This solution is for reference only.
It really doesn't work, do you check the organic chemistry book?I remember when talking about the accumulation, there is data in the water, but it is difficult to say whether there is any relevant data in the water -free ethanol
VOTE
\u0026 nbsp; \u0026 nbsp;The method of chromatography may be a bit difficult, because my understanding of the chromatography seems to be impossible to peak the peak of inorganic objects.Because the chromatography itself has restrictions on the temperature requirements, it is almost impossible to use calcium hydroxide at restricted temperatures, so the general chromatography is used to analyze organic matter.I really do n’t understand the method of solubility accumulation. It ’s been several years since I left books and experiments, haha.However, I know the atomic absorption and ICP can do trace analysis. These two methods should be fine.Just now, I didn't respond for a while.
\u0026 nbsp; \u0026 nbsp;The method of chromatography may be a bit difficult, because my understanding of the chromatography seems to be impossible to peak the peak of inorganic objects.Because the chromatography itself has restrictions on the temperature requirements, it is almost impossible to use calcium hydroxide at restricted temperatures, so the general chromatography is used to analyze organic matter.I really do n’t understand the method of solubility accumulation. It ’s been several years since I left books and experiments, haha.However, I know the atomic absorption and ICP can do trace analysis. These two methods should be fine.Just now, I didn't respond for a while.
VOTE
\u0026 nbsp; \u0026 nbsp;At that time, I will announce the data.It is hoped that someone has done it, because my sample is mainly calcium hydroxide, more than 80%, and some more difficult substances than calcium hydroxide can be ignored.
\u0026 nbsp; \u0026 nbsp;At that time, I will announce the data.It is hoped that someone has done it, because my sample is mainly calcium hydroxide, more than 80%, and some more difficult substances than calcium hydroxide can be ignored.
VOTE
\u0026 nbsp; \u0026 nbsp; polite.It is mainly learning to come to Haichuan. Services are just sidelines.You can learn quite a lot of professional knowledge here, and I also wish you a full load.
\u0026 nbsp; \u0026 nbsp; polite.It is mainly learning to come to Haichuan. Services are just sidelines.You can learn quite a lot of professional knowledge here, and I also wish you a full load.
VOTE
\u0026 nbsp; \u0026 nbsp; calcium hydroxide insoluble 0.176 (0*c), 0.17 (10 (10) (10*C), 0.16 (20*C), 0.155 (25*C), 0.148 (30*C), 0.137 (40*C), 0.114 (60*C), 0.092 (80*C), 0.072 (100******C)C), 0.035 (150*c), 0.012 (200*c)
This is the \u0026 nbsp; \u0026 nbsp; I hope I can help you ...
\u0026 nbsp; \u0026 nbsp; calcium hydroxide insoluble 0.176 (0*c), 0.17 (10 (10) (10*C), 0.16 (20*C), 0.155 (25*C), 0.148 (30*C), 0.137 (40*C), 0.114 (60*C), 0.092 (80*C), 0.072 (100******C)C), 0.035 (150*c), 0.012 (200*c)
This is the \u0026 nbsp; \u0026 nbsp; I hope I can help you ...
VOTE
\u0026 nbsp; \u0026 nbsp; atomic light absorption light method should be no problem, we once measured the aquatic solutionCalcium ion concentration and high accuracy.The chromatography does not know well, it should be okay.Is the chromatographic calcium hydroxide gasification, and calcium hydroxide in it should exist in particles.The solubility accumulation is the test question in materialization.
\u0026 nbsp; \u0026 nbsp; atomic light absorption light method should be no problem, we once measured the aquatic solutionCalcium ion concentration and high accuracy.The chromatography does not know well, it should be okay.Is the chromatographic calcium hydroxide gasification, and calcium hydroxide in it should exist in particles.The solubility accumulation is the test question in materialization.
VOTE
VOTE
\u0026 nbsp; \u0026 nbsp;Specializing in research and work has nothing to do with work.EssenceEssence
\u0026 nbsp; \u0026 nbsp;Specializing in research and work has nothing to do with work.EssenceEssence
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\u0026 nbsp; \u0026 nbsp; Since it is almost insoluble, the visual inspection must not, refer to the conventional solubility measurement method.The amount of dissolution can almost ignore the measurement.You can't see a method. You can't see it. The chromatography method is used to detect the concentration of calcium ions in the ethanol after saturated, and then calculate the solubility.Or you can refer to the measurement of the solubility of insoluble items such as silver chloride, such as measuring solubility accumulation,
\u0026 nbsp; \u0026 nbsp; Since it is almost insoluble, the visual inspection must not, refer to the conventional solubility measurement method.The amount of dissolution can almost ignore the measurement.You can't see a method. You can't see it. The chromatography method is used to detect the concentration of calcium ions in the ethanol after saturated, and then calculate the solubility.Or you can refer to the measurement of the solubility of insoluble items such as silver chloride, such as measuring solubility accumulation,
VOTE
\u0026 nbsp; \u0026 nbsp; Oh, thank you!Is that ion color score?Such as mete chloride ions in an ion.
\u0026 nbsp; \u0026 nbsp; Oh, thank you!Is that ion color score?Such as mete chloride ions in an ion.
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\u0026 nbsp; \u0026 nbsp; basically insoluble at room temperature.In addition, can this be done?Is it dissolved in visual inspection?I really do n’t understand this, there is a way to talk about it, communicate
\u0026 nbsp; \u0026 nbsp; basically insoluble at room temperature.In addition, can this be done?Is it dissolved in visual inspection?I really do n’t understand this, there is a way to talk about it, communicate
VOTE
\u0026 nbsp; \u0026 nbsp;If the granularity of calcium oxide will be dissolved with deodorizing water, the measurement result will not make sense (unable to measure the dry method). If you want to use ethanol, you must know the solubility in the ethanol.
\u0026 nbsp; \u0026 nbsp;If the granularity of calcium oxide will be dissolved with deodorizing water, the measurement result will not make sense (unable to measure the dry method). If you want to use ethanol, you must know the solubility in the ethanol.
VOTE
Then you are purely dissolved in calcium hydroxide in water -free ethanol \u0026 nbsp; \u0026 nbsp; Is it allowed to add any substances
Then you are purely dissolved in calcium hydroxide in water -free ethanol \u0026 nbsp; \u0026 nbsp; Is it allowed to add any substances
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Let's reference
Let's reference
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\u0026 nbsp; \u0026 nbsp;If you must give a value, I think you can tell him zero.
\u0026 nbsp; \u0026 nbsp;If you must give a value, I think you can tell him zero.
VOTE
2026-07-22
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