High school chemistry compulsory one while learning while practicing: 2.2.2 chlorine laboratory preparation and chloride ion testing learning content will record a synchronous explanatory video, pay attention to it, high school chemistry synchronization course, published in the watermelon video Word file download address at the end of the article, (help to turn to the end of the article, add a KPI) link: https://pan.baidu.com/s/1GUEzlzccraHJo9HymtwssQ Extraction code: hlx6
author：Xiao Wang talks about chemistry
<h1 class="pgc-h-arrow-right" data-track="1" > learning content will record synchronous explanatory videos</h1>
<h1 class="pgc-h-arrow-right" data-track="2" > high school chemistry synchronization course, posted in watermelon video</h1>
<h1 class="pgc-h-arrow-right" data-track="3" >word file download address at the end of the text, (help to turn to the end of the text, add a KPI).</h1>
High school chemistry compulsory one while learning while practicing: 2.2.2 chlorine laboratory preparation and chloride ion testing learning content will record a synchronous explanatory video, pay attention to it, high school chemistry synchronization course, published in the watermelon video Word file download address at the end of the article, (help to turn to the end of the article, add a KPI) link: https://pan.baidu.com/s/1GUEzlzccraHJo9HymtwssQ Extraction code: hlx6
High school chemistry compulsory one while learning while practicing: 2.2.2 chlorine laboratory preparation and chloride ion testing learning content will record a synchronous explanatory video, pay attention to it, high school chemistry synchronization course, published in the watermelon video Word file download address at the end of the article, (help to turn to the end of the article, add a KPI) link: https://pan.baidu.com/s/1GUEzlzccraHJo9HymtwssQ Extraction code: hlx6
3． Collection method
(1) Upward exhaust air method (chlorine gas density is greater than air).
(2) Saturated table brine method (the solubility of chlorine in saturated sodium chloride solution is very small, and the hydrogen chloride gas generated by volatilization in the experiment can be removed by this method).
4． Full test method
(1) The moist starch potassium iodide test strip is close to the mouth of the chlorine-containing bottle, and the test paper is observed to turn blue immediately, which proves that it has been full.
Inspection principle:
(2) The wet blue litmus test paper is close to the mouth of the bottle containing chlorine gas, and the test paper is observed to change immediately to turn red and then fade, which proves that it is full.
5． Exhaust gas treatment
(1) The liquid contained in beaker F in the instrument and apparatus figure is.
(2) The role of the liquid is. chemical equation:
6. Precautions
(1) The selection of reactants: it must be used with concentrated hydrochloric acid, dilute hydrochloric acid does not react with MnO2, and as the reaction proceeds, when the concentrated hydrochloric acid becomes dilute hydrochloric acid, the reaction stops, so the HCl in hydrochloric acid cannot all participate in the reaction.
(2) Heating temperature: should not be too high to reduce HCl volatilization.
(3) After the end of the experiment, first stop the reaction and discharge the residual Cl2, and then disassemble the device to avoid polluting the air.
(4) When the exhaust gas is absorbed, Cl2 is absorbed with NaOH solution, and cannot be absorbed with clear lime water, because the amount of Ca(OH)2 containing ca(OH)2 in the solution is small and the absorption is incomplete.
High school chemistry compulsory one while learning while practicing: 2.2.2 chlorine laboratory preparation and chloride ion testing learning content will record a synchronous explanatory video, pay attention to it, high school chemistry synchronization course, published in the watermelon video Word file download address at the end of the article, (help to turn to the end of the article, add a KPI) link: https://pan.baidu.com/s/1GUEzlzccraHJo9HymtwssQ Extraction code: hlx6
High school chemistry compulsory one while learning while practicing: 2.2.2 chlorine laboratory preparation and chloride ion testing learning content will record a synchronous explanatory video, pay attention to it, high school chemistry synchronization course, published in the watermelon video Word file download address at the end of the article, (help to turn to the end of the article, add a KPI) link: https://pan.baidu.com/s/1GUEzlzccraHJo9HymtwssQ Extraction code: hlx6
High school chemistry compulsory one while learning while practicing: 2.2.2 chlorine laboratory preparation and chloride ion testing learning content will record a synchronous explanatory video, pay attention to it, high school chemistry synchronization course, published in the watermelon video Word file download address at the end of the article, (help to turn to the end of the article, add a KPI) link: https://pan.baidu.com/s/1GUEzlzccraHJo9HymtwssQ Extraction code: hlx6
High school chemistry compulsory one while learning while practicing: 2.2.2 chlorine laboratory preparation and chloride ion testing learning content will record a synchronous explanatory video, pay attention to it, high school chemistry synchronization course, published in the watermelon video Word file download address at the end of the article, (help to turn to the end of the article, add a KPI) link: https://pan.baidu.com/s/1GUEzlzccraHJo9HymtwssQ Extraction code: hlx6
High school chemistry compulsory one while learning while practicing: 2.2.2 chlorine laboratory preparation and chloride ion testing learning content will record a synchronous explanatory video, pay attention to it, high school chemistry synchronization course, published in the watermelon video Word file download address at the end of the article, (help to turn to the end of the article, add a KPI) link: https://pan.baidu.com/s/1GUEzlzccraHJo9HymtwssQ Extraction code: hlx6
High school chemistry compulsory one while learning while practicing: 2.2.2 chlorine laboratory preparation and chloride ion testing learning content will record a synchronous explanatory video, pay attention to it, high school chemistry synchronization course, published in the watermelon video Word file download address at the end of the article, (help to turn to the end of the article, add a KPI) link: https://pan.baidu.com/s/1GUEzlzccraHJo9HymtwssQ Extraction code: hlx6
High school chemistry compulsory one while learning while practicing: 2.2.2 chlorine laboratory preparation and chloride ion testing learning content will record a synchronous explanatory video, pay attention to it, high school chemistry synchronization course, published in the watermelon video Word file download address at the end of the article, (help to turn to the end of the article, add a KPI) link: https://pan.baidu.com/s/1GUEzlzccraHJo9HymtwssQ Extraction code: hlx6
