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Óйط´Ó¦Îª£º2Cr2O7? + 3C+ 16 H £½ 4 Cr3 + 3 CO2 + 8 H2O`

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?0.1000?15.00?101001000?3???0.01667?25.00?10??33???32?10?2?80.04mg?L?1

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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

Óйط´Ó¦Îª£ºCH3COCH3 + 3 I2+ 4 NaOH £½ CH3COONa + 3 NaI + 3 H2O+ CH3I

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?CH3COCH3?3?n×ÜI2?nÊ£I?MCH2?3COCH3mÑù?25.00250.00?100%

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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

(1) ÔÚNaHCO3½éÖÊÖУºSbO33- + I2 £½ 2 I? + Sb5+

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Sb2S5 + 10 H £½ 5 H2S + 2 Sb

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+

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2+2+

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