重量分析分析化學(xué)第四版部分習(xí)題答案

1、第九章 重量分析參考答案14解：加入過量50%的沉淀劑，需的h2so4的體積為：15解：（1） 在純水中，各種效益都不考慮時(shí)，所以 （2）只考慮同離子效益時(shí)， 所以 補(bǔ)充：若同時(shí)考慮鹽效應(yīng)時(shí)，由于有存其它副反應(yīng)。所以 離子強(qiáng)度為 根據(jù)戴維斯公式 計(jì)算得：故 （3）根據(jù)戴維斯公式 計(jì)算得：由于僅考慮鹽效應(yīng)，所以 故 （4）在溶液中，（或：）因?yàn)橹豢紤]酸效應(yīng)，所以 故 補(bǔ)充：同時(shí)考慮鹽效應(yīng)時(shí) 根據(jù)戴維斯公式 計(jì)算得 （，不切合實(shí)際情況，錯(cuò)在哪里？）故 （5）當(dāng)時(shí)， 所以 由于僅考慮絡(luò)合效應(yīng)，所以故 16解： hf的只存在酸效應(yīng)，所以17解：（1） 在溶液中，由于濃度較小，所以只考慮同離子效應(yīng)（2）

2、溶液液中由于濃度較小，所以只考慮同離子效應(yīng) 所以在中溶解度大。18解：的 的的 時(shí)，主要考慮絡(luò)合效應(yīng)，所以故 19解： 的 或：時(shí)，已知此時(shí)，主要考慮同離子效應(yīng)和副反應(yīng)，忽略鹽效應(yīng)所以 設(shè)此時(shí)的溶解度為s，則 20的 的 因?yàn)?，所以忽略第二步水解作用考慮：水解常數(shù) 僅考慮的酸效應(yīng)，所以21解：（1）（2）（3）22（1）（3）偏低（2） 偏高（4）無影響23解： acknowledgements my deepest gratitude goes first and foremost to professor aaa , my supervisor, for her constant enco

3、uragement and guidance. she has walked me through all the stages of the writing of this thesis. without her consistent and illuminating instruction, this thesis could not havereached its present form. second, i would like to express my heartfelt gratitude to professor aaa, who led me into the world

4、of translation. i am also greatly indebted to the professors and teachers at the department of english: professor dddd, professor ssss, who have instructed and helped me a lot in the past two years. last my thanks would go to my beloved family for their loving considerations and great confidence in

5、me all through these years. i also owe my sincere gratitude to my friends and my fellow classmates who gave me their help and time in listening to me and helping me work out my problems during the difficult course of the thesis. my deepest gratitude goes first and foremost to professor aaa , my supe

6、rvisor, for her constant encouragement and guidance. she has walked me through all the stages of the writing of this thesis. without her consistent and illuminating instruction, this thesis could not havereached its present form. second, i would like to express my heartfelt gratitude to professor aa

7、a, who led me into the world of translation. i am also greatly indebted to the professors and teachers at the department of english: professor dddd, professor ssss, who have instructed and helped me a lot in the past two years. last my thanks would go to my beloved family for their loving considerations and great confidence in me all through these years. i also owe my sincere gratitude to my friends and my fellow classmates who gave me