[Soda Ash Knowledge] Question of the Day (45) November 17, 2009
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Please hide the reply; no scoring will be given in principle if it is not hidden. Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Posts that have been edited are not rated. (The question for this issue is taken from page 72 of \"Technical Worker Training Question Bank – Soda Ash Production Operators.\" An electronic version of this book is available for download in the soda ash information sharing area: http://bbs.hcbbs.com/thread-13140-1-2.html) True or False question: 11. An NaCl aqueous solution is neutral. ( ) 12. When analyzing the components of kiln gas using the Orsat apparatus, CO2 should be measured first, then CO, and finally O2. （ ） 13. In a solution with pH=10, adding methyl orange gives a yellow color. ( ) 14. When S2– is present in the denominator solution, the iodometry method is used. （ ） 15. The NH3-NH4Cl solution is a type of solution that can stabilize the acidity of the solution. （ ）
This post was last edited by lxq700918 on 2009-11-17 09:08. 11. An aqueous solution of NaCl is neutral. (∨) 12. When analyzing the components of kiln gas using an O-style analyzer, CO2 should be measured first, followed by CO, and finally O2. (∨) 13. In a solution with pH = 10, adding methyl orange results in a yellow color. (×) 14. When S2– is present in the denominator solution, the iodometry method is used. (∨) 15. The NH3-NH4Cl solution is a type of solution that can stabilize the acidity of the solution. (∨) 1# chen3jun