[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fjp1TQJ2wFWuYUsK0sIPPKkCjOzhVPsn2i-KWFWuuM6Q":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":15,"related":16,"source":26,"type":67},[],"2026-01-14 09:46:28",311956830,[],{"count":9,"courseId":10,"courseImg":11,"courseName":12,"workId":13,"workName":14},17,"3767e8ea27cc677aaf13933c499738dc","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc1d53259fd3c1130825e48e28a54b92a.jpg","分析化学","work_46852534","全面深化改革的目标和主要内容","已知NH3的Kb=1.8×10-5, 当NH3-NH4Cl缓冲溶液的pH=9.0时, 该溶液中 [NH3]\u002F[NH4Cl]为______",[17,28,37,46,55,64,68,73,83,88],{"answer":18,"createTime":5,"id":19,"options":20,"question":25,"source":26,"type":27},[],311956825,[21,22,23,24],"6.49","6.99","7.49","9.22","1. 将1.0 mol\u002FL NaAc与0.10 mol\u002FL H3BO3等体积混合,所得溶液pH是--------------( ) [pKa(HAc) = 4.74, pKa(H3BO3) = 9.24] (A) 6.49 (B) 6.99 (C) 7.49 (D) 9.22","v1",0,{"answer":29,"createTime":5,"id":30,"options":31,"question":36,"source":26,"type":27},[],311956826,[32,33,34,35],"4~6","6~8","8~10","9-11","六次甲基四胺[(CH2)6N4]缓冲溶液的缓冲pH范围是-------------------------------------( ) ípKb[(CH2)6N4] = 8.85ý",{"answer":38,"createTime":5,"id":39,"options":40,"question":45,"source":26,"type":27},[],311956827,[41,42,43,44],"NaAc","Na2CO3","Na2B4O7·10H2O","Na2HPO4","下列盐的水溶液缓冲作用最强的是---------------------------------------------------------( )",{"answer":47,"createTime":5,"id":48,"options":49,"question":54,"source":26,"type":27},[],311956828,[50,51,52,53],"一氯乙酸(pKa = 2.86)","氨水(pKb = 4.74)","六次甲基四胺(pKb = 8.85)","甲酸(pKa = 3.74)","欲配制pH=5.1的缓冲溶液,最好选择--------------------------------------------------------( )",{"answer":56,"createTime":5,"id":57,"options":58,"question":63,"source":26,"type":27},[],311956829,[59,60,61,62],"NH2OH(羟氨) (Kb = 9.1×10-9)","NH3·H2O (Kb = 1.8×10-5)","CH3COOH (Ka = 1.8×10-5)","HCOOH (Ka = 1.8×10-4)","欲配制pH=9的缓冲溶液,应选用---------------------------------------------------------------( )",{"answer":65,"createTime":5,"id":6,"options":66,"question":15,"source":26,"type":67},[],[],2,{"answer":69,"createTime":5,"id":70,"options":71,"question":72,"source":26,"type":67},[],311956831,[],"对于某一给定的缓冲体系,缓冲容量的大小与__________和_________有关",{"answer":74,"createTime":75,"id":76,"options":77,"question":82,"source":26,"type":27},[],"2026-01-16 12:33:16",313360018,[78,79,80,81],"オ","ア","ル","サ","あいしている",{"answer":84,"createTime":75,"id":85,"options":86,"question":82,"source":26,"type":27},[],313360019,[87,79,80,81],"イ",{"answer":89,"createTime":75,"id":90,"options":91,"question":94,"source":26,"type":27},[],313360020,[92,93,80,81],"ウ","チ","こんにちは"]