在pH=5的六次甲基四胺缓冲溶液中以EDTA满定
，在化学计量点后的pPb值( )。
A: 与
(PbY)和c (Pb)均有关
B: 只与(PbY)有关
C: 其他选项都不正确
D: 只与lg c (Pb)有关
，在化学计量点后的pPb值( )。A: 与
(PbY)和c (Pb)均有关B: 只与
(PbY)有关C: 其他选项都不正确
D: 只与lg c (Pb)有关
举一反三
- 通过点<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/a13927df1bf542dfa036a32b10364f69.png" />的拉格朗日插值基函数<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/65695a42c7a14b649b6aa4fb68f7e499.png" />满足( ) A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/99af333f3e934ef6a75022ee1e728b53.png" />＝1，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/7769611ac5cd4c93975be7c41a49ae71.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/99af333f3e934ef6a75022ee1e728b53.png" />＝1，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/7769611ac5cd4c93975be7c41a49ae71.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/99af333f3e934ef6a75022ee1e728b53.png" />＝0，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/7769611ac5cd4c93975be7c41a49ae71.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/99af333f3e934ef6a75022ee1e728b53.png" />=0，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/f80e8e400f3f4916bcaf6b5fde757f16.png" />
- 欲配制pH=9的缓冲溶液，应选用的缓冲体系是（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/1140fb103686402aa9a9c947693376e1.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/ce55817df4b542a9adfacc614e9a400e.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/3ce35cb64b32415eb221151584e4aa7a.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/34d36edb82204516ad44f08c7fd429db.png" />
- 在pH=10.0的氨性缓冲溶液中，以EDTA滴定等浓度的<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/3c5f69662f6241d7a64466c0a7b448e4.png" />至化学计量点时，以下叙述正确是（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/342422706dbf4c0299fb7849c5e82e24.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/3bfa2d4165b3473e8a971eb261d80238.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/84c2c498f912443fa79005e2bd1792b8.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/4bcba247e4e24070959609315054bade.png" />
- 在下列的HTML中，哪个可以产生超链接？ A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/a9bcf63958144ed794c2429877db052a.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/5f5d626c8bba4c9486c2455dc0f20be5.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/3a165307757a4da5b4e34381b1fe8cf5.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/334e855f187b4c2684d73890e18d5988.png" />
- 欲配制PH=5.1的缓冲溶液，缓冲体系最好选择（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/fb37cdea0a5342eeb3d4194d51fdfe1e.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/400c8426652040c88590fa0d0f3db998.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/9cf4535978604324a7e991d2c75610a1.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/dac8d51faa38412b9494d77593d7ecc8.png" />