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µªÔÓ·Æ-ÑÇÌúΪָʾ¼Á£¬ÓÃ0.1000mol.L FeSO4ÈÜÒºµÎ¶¨Ê£ÓàµÄK2Cr2O7£¬ÓÃÈ¥15.00 mL¡£¼ÆËã·ÏË®Ñù
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22
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?n?COD?×ÜK2Cr2O7?nÊ£K2Cr2O7??3?M2?3O2VÑù?16
?0.1000?15.00?101001000?3???0.01667?25.00?10??33???32?10?2?80.04mg?L?1
6.19 ³ÆÈ¡±ûͪÊÔÑù1.000 g£¬¶¨ÈÝÓÚ250 mLÈÝÁ¿Æ¿ÖУ¬ÒÆÈ¡25.00 mLÓÚÊ¢ÓÐNaOHÈÜÒºµÄµâÁ¿Æ¿ÖУ¬
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׼ȷ¼ÓÈë50.00 mL 0.05000 mol.L I2±ê×¼ÈÜÒº£¬·ÅÖÃÒ»¶¨Ê±¼äºó£¬¼ÓH2SO4µ÷½ÚÈÜÒº³ÊÈõËáÐÔ£¬Á¢¼´ÓÃ0.1000 mol.L-1 Na2SO4ÈÜÒºµÎ¶¨¹ýÁ¿µÄI2£¬ÏûºÄ10 mL¡£¼ÆËãÊÔÑùÖбûͪµÄÖÊÁ¿·ÖÊý¡£ ´ð°¸£º
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22I2 + 2 S2O3? £½ 2 I? + S4O6?
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1
?CH3COCH3?3?n×ÜI2?nÊ£I?MCH2?3COCH3mÑù?25.00250.00?100%
1?1??3?0.0500?50.00??0.1000?10.00??10?58.073?2???100%?38.71%.001.000?250.00
6.20 ³ÆÈ¡º¬ÓÐNa2SºÍSb2S5ÊÔÑù0.2000 g£¬Èܽâºó£¬Ê¹SbÈ«²¿±äΪSbO33-ºó£¬ÔÚNaHCO3½éÖÊÖÐÒÔ0.01000 mol.L-1 I2ÈÜÒºµÎ¶¨ÖÁÖյ㣬ÏûºÄ20.00 m L£»ÁíȡͬÑùÖÊÁ¿µÄÊÔÑùÈÜÓÚËáºó£¬½«²úÉúµÄH2S
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ÍêÈ«ÎüÊÕÓ뺬ÓÐ70.00 mLÏàͬŨ¶ÈI2ÈÜÒºÖУ¬ÒÔ0.02000 mol.L Na2S2O3ÈÜÒºµÎ¶¨¹ýÁ¿µÄI2ÈÜÒº£¬ÏûºÄ10.00 mL¡£¼ÆËãÊÔÑùÖÐNa2SºÍSb2S5µÄÖÊÁ¿·ÖÊý¡£ ´ð°¸£º
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1??Sb2S5?2CI2?VI2?MmÑù1Sb2S5?100%?2?0.01000?20.00?403.86?100.2000+
?3?100%?20.20%(2) (2) Na2S + 2 H £½ H2S + 2 Na
+
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+
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