Daily Question 9.7
Thread Content
1. Please hide your replies; editing after posting is ineffective! Delete directly without hiding! 2. Hiding method: http://bbs.hcbbs.com/thread-492556-1-1.html 3. 5 points for correct answers; there is a reward for everyone who participates. Judgment: 1. Ultra-pure sulfuric acid is generally prepared by the industrial sulfuric acid distillation method or by direct absorption of sulfur trioxide gas (for the purification and production of sulfur trioxide). ( )2. Generally speaking, when the acid temperature is above 65°C and the acid concentration is below 98%, carbon steel is not suitable for use. ( ) Right Right
Reply 1# A Shan Yes, that’s right
√、√Reply 1# A Shan
Reply 1# A Shan Yes, that’s right
Reply to 1# A Shan: Wrong, wrong
Reply to 1# A Shi: Yes, that’s right
Reply to 1# A Shan: Both are correct.