[Soda Ash Knowledge] Daily Question (44) 11/16/2009
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Please hide the replies; no scoring will be given in principle if they are 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 at http://bbs.hcbbs.com/thread-13140-1-2.html) True or False question: 6. When taking samples from the kiln gas transmission pipeline, the sampling tube should be inserted to a depth equal to 1/3 of the diameter of the pipeline. （ ） 7. Funnels used for mass analysis are generally short-necked funnels. （ ） 8. When analyzing the moisture content of heavy alkalis, the mass method is used. （ ） 9. In a solution with PH=2, the Mohr method can be used to determine CL-. ( ) 10. When determining ferric oxide in the mother liquor, the sample should first be acidified with concentrated nitric acid to completely oxidize Fe2+ to Fe3+. ( )
Today’s (Daily Soda Ash Quiz) answer is: Wrong, Right, Right, Right, Right
The last edit to this post was made by lxq700918 on 2009-11-15 at 23:15. 6. When taking samples from the kiln gas transmission pipeline, the sampling tube should be inserted to a depth of 1/3 of the pipeline’s diameter. (×) 7. Funnels used for mass analysis are generally short-necked funnels. (∨) 8. When analyzing the moisture content of heavy alkalis, the mass method is used. (∨) 9. In a solution with PH=2, the Mohr method can be used to determine CL-. (×) 10. When determining ferric oxide in the mother liquor, the sample should first be acidified with concentrated nitric acid to completely oxidize Fe2+ to Fe3+. (∨) 1# chen3jun
1# chen3jun 1. Correct； 2. Wrong ； 3. Wrong ； 4. Wrong ； 5. Wrong.
6. When sampling from the kiln gas transmission pipeline, the sampling tube should be inserted to a depth of 1/3 of the pipeline’s diameter. (Yes) 7. Funnels used for mass analysis are generally short-necked funnels. (Wrong) 8. When analyzing the moisture content of heavy alkalis, the mass method is used. (Incorrect) 9. In a solution with pH=2, the Mohr method can be used to determine Cl-. (Incorrect) 10. When determining ferric oxide in the mother liquor, the sample should first be acidified with concentrated nitric acid to completely oxidize Fe2+ to Fe3+. ( Wrong )
6. True 7. True 8. False 9. True 10. False