【简答题】取水样100.00mL,在pH=10.0时,用铬黑T为指示剂,用19.00mL 0.01050mol·L -1 的EDTA标准溶液滴定至终点,计算水的总硬度。
【简答题】Passage 2 "There is a senseless notion that children grow up and leave home when they' re 18, and the truth is far from that, "says sociologist Larry Bumpass of the University of Wisconsin. Today, une...
【简答题】用pH玻璃电极在测量pH很高(如pH>9)的溶液时,pH测定值比实际值______,称为______;而在测定pH很低的溶液时(如pH<1),pH测定值比实际值______,称为______。
【简答题】根据EDTA的各级离解常数,试计算在pH=5.0和pH=10.0时lgα Y(H) 值。
【简答题】Why does the writer give the passage the title "The Tail of Fame"? 2. Is fame something you will strive to seek? Give your reasons. 3. How do you understad "for most people, failure is the end of stru...
【单选题】在运输过程中旅客自带物品毁坏、灭失,承运人承担损害赔偿责任的条件是承运人有( )
【单选题】在运输过程中旅客自带物品毁坏、灭失,承运人有 的,应当承担损害赔偿责任。
【简答题】Fill in each of the blanks with an appropriate word according to what you have read from Passage A " The Unsung Heroes: What About Working Dads?"(在线上需要写 完整 的单词!如“media”,而不是“edia”,否则不得分) Nowadays there...