“\"Chlor-alkali exam questions\" [034] discussion post – please hide your replies
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This post was last edited by sunjl1981 on 2013-1-6 at 21:56. To encourage active participation from members, 3 wealth points are given for each correct answer; if a calculation process is provided, or if a valid reason is given, an additional reward of 3 to 6 wealth points is awarded. I believe it’s not about the quantity, but having a reward is enough. The key is everyone’s active participation (participation brings talent) and progressing together. (Note: Only moderator ratings are valid for this post; other ratings are invalid.) True or False questions: 1. The total mass of all substances involved in a chemical reaction is equal to the total mass of all substances formed as products after the reaction ( ). 2. In the production of caustic soda, it’s better to have as low a level of SO42- in the brine as possible; it’s ideal to remove it completely ( ). 3. Theoretically, about 0.15–0.18 tons of NaCl are required to produce 1 ton of 100% NaOH ( ). Please hide your replies; ratings will not be given unless replies are hidden. For instructions on how to hide replies, click here: Hiding method. Answer using the same IP; only the first post is valid. Also, be careful when posting – edits are invalid! Thank you all! Answer key: True False False # hcbbs
1 is wrong; there are still ones that don’t react. 2 is wrong – the sulfate ions must be completely removed, unless barium chloride is used. 3 is wrong
Yes, yes, wrong 1# Yienuo Zhang
1 Correct, it’s the law of conservation of mass. 2 Incorrect; adding barium chloride does not remove all nitrate sulfate ions, and this prevents an excess of barium ions. 3 Incorrect, 1.48–1.50 t/t
This post was last edited by scu2000 on 2010-1-11 22:33. Right, Wrong, Wrong
1. Right 2. Right 3. Wrong