• 2022-06-27 问题

    用[tex=3.071x1.214]DUqsOcBfQt/1pNqXbtCl7Q==[/tex]重量法测定[tex=2.286x1.214]SpGpIURE2baUK39RNHxhlA==[/tex]含量,若结果偏低,可能是由于()。A.沉淀中含有[tex=2.071x1.214]Dx58iUCrL0ZuzVxBncjJGg==[/tex]等杂质B.沉淀中包藏了[tex=2.714x1.214]IU5J69F/Djwwl48iM0uMVg==[/tex]C.沉淀剂[tex=2.929x1.214]40bu3NA2kYm+17KNYGf+iQ==[/tex]在灼烧时挥发D.沉淀灼烧的时间不够

    用[tex=3.071x1.214]DUqsOcBfQt/1pNqXbtCl7Q==[/tex]重量法测定[tex=2.286x1.214]SpGpIURE2baUK39RNHxhlA==[/tex]含量,若结果偏低,可能是由于()。A.沉淀中含有[tex=2.071x1.214]Dx58iUCrL0ZuzVxBncjJGg==[/tex]等杂质B.沉淀中包藏了[tex=2.714x1.214]IU5J69F/Djwwl48iM0uMVg==[/tex]C.沉淀剂[tex=2.929x1.214]40bu3NA2kYm+17KNYGf+iQ==[/tex]在灼烧时挥发D.沉淀灼烧的时间不够

  • 2022-06-06 问题

    已知[tex=21.571x1.643]tz4i2vblxXKjVXDEWfebkJl4CF4DhYYO7J0FTlMSAysxTZ9p3uX46Ju7kgHW394Ux9u12Kx0Szq0CcwaWyw9tkf4fDKV9VVR3np9EkFYnrvkBpWrq7O+OkmQluFDN+91/AqYAhva90iLRVLKlvFF2XhphLCh7WRUpntzUQRSMJM=[/tex],在含有[tex=2.286x1.214]8w7PdgNlyGikkGR/qVYjQA==[/tex] 固体和[tex=3.071x1.214]DUqsOcBfQt/1pNqXbtCl7Q==[/tex]固体的溶液中,[tex=12.786x1.571]SpR0fqE+WA5fKEmbT1r4STRzNWM4RG13J3KhuTdudJlpNO3CA14BfRrgP3j0GljefdzK3fQ/X6eaI2f/kSttl7z3Gx3pg3QIgwpzcuEYSlw=[/tex],则溶液中的[tex=4.714x1.571]NpnBNAPUfvXZQO9NZO8I8ao+T/ql2lWOalScrwE8evE=[/tex][input=type:blank,size:4][/input][tex=7.714x1.571]E7JZSwbCbBXM4kiUWX3WC50hKcDSbk03hVaizouZJNhChdse0TOrm+2vFfxLu47B[/tex][input=type:blank,size:4][/input][tex=3.571x1.214]E7JZSwbCbBXM4kiUWX3WC+DeJhyYVR/0ujpdKUdUyas=[/tex]。

    已知[tex=21.571x1.643]tz4i2vblxXKjVXDEWfebkJl4CF4DhYYO7J0FTlMSAysxTZ9p3uX46Ju7kgHW394Ux9u12Kx0Szq0CcwaWyw9tkf4fDKV9VVR3np9EkFYnrvkBpWrq7O+OkmQluFDN+91/AqYAhva90iLRVLKlvFF2XhphLCh7WRUpntzUQRSMJM=[/tex],在含有[tex=2.286x1.214]8w7PdgNlyGikkGR/qVYjQA==[/tex] 固体和[tex=3.071x1.214]DUqsOcBfQt/1pNqXbtCl7Q==[/tex]固体的溶液中,[tex=12.786x1.571]SpR0fqE+WA5fKEmbT1r4STRzNWM4RG13J3KhuTdudJlpNO3CA14BfRrgP3j0GljefdzK3fQ/X6eaI2f/kSttl7z3Gx3pg3QIgwpzcuEYSlw=[/tex],则溶液中的[tex=4.714x1.571]NpnBNAPUfvXZQO9NZO8I8ao+T/ql2lWOalScrwE8evE=[/tex][input=type:blank,size:4][/input][tex=7.714x1.571]E7JZSwbCbBXM4kiUWX3WC50hKcDSbk03hVaizouZJNhChdse0TOrm+2vFfxLu47B[/tex][input=type:blank,size:4][/input][tex=3.571x1.214]E7JZSwbCbBXM4kiUWX3WC+DeJhyYVR/0ujpdKUdUyas=[/tex]。

  • 1