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1CKBrO3?6VKBrO?nS12O32??6?0.10200?19.61?1020.00?10?3?3?0.01667mol?L?13

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m(NH2OH.HCl)=c(BrO3?)¡ÁM(NH2OH.HCl)=1.158mg¡¤mL

6.10 ³ÆÈ¡º¬KIÖ®ÊÔÑù1.000gÈÜÓÚË®¡£¼Ó10 mL 0.05000 mol.L-1 KIO3ÈÜÒº´¦Àí£¬·´Ó¦ºóÖó·ÐÇý¾¡ËùÉú³ÉµÄI2£¬ÀäÈ´ºó£¬¼ÓÈë¹ýÁ¿KIÈÜÒºÓëÊ£ÓàµÄKIO3·´Ó¦¡£Îö³öI2µÄÐèÓÃ21.14 mL 0.1008 mol.L-1 Na2S2O3ÈÜÒºµÎ¶¨¡£¼ÆËãÊÔÑùÖÐKIµÄÖÊÁ¿·ÖÊý¡£

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Óйط´Ó¦Îª£º 5I? + IO3? + 6 H+ £½ 3 I2 + 3 H2O

22I2 + 2 S2O3? £½ 2 I? + S4O6?

¹Ê£º 5 I? ~ IO3? ~ 3 I2 ~ 6 S2O32?

??KI?1??5?n?n??M?2?S2O3IO36??mÑùKI?100%??10?0.05121.14?0.1008??????5?166.0133610?10?1.000?100%?12.02%

6.11 ½«1.000g¸ÖÑùÖеĸõÑõ»¯³ÉCr2O72-£¬¼ÓÈë25.00 mL 0.1000 mol.L-1 FeSO4±ê×¼ÈÜÒº£¬È»ºóÓÃ0.0180

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mol.L KMnO4±ê×¼ÈÜÒº7.00 mL»ØµÎÊ£ÓàµÄFeSO4ÈÜÒº¡£¼ÆËã¸ÖÑùÖиõµÄÖÊÁ¿·ÖÊý¡£ ´ð°¸£º

Óйط´Ó¦Îª£ºCr2O72? + 6 Fe2+ + 14 H+ £½ 2 Cr3+ + 6 Fe2+ + 7 H2O

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5 Fe + MnO4? + 8 H £½ 5 Fe + Mn + 8 H2O

2 222

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?Cr?31?nFe2??5nMnOmÑù?4??MCr?100%

?3?3?0.1000?25.00?5?0.0180?7.00???101.000?52.00?100%?3.24%

6.12 10.00 mLÊÐÊÛH2O2£¨Ïà¶ÔÃܶÈ1.010£©ÐèÓÃ36.82 mL 0.02400 mol.L-1 KMnO4ÈÜÒºµÎ¶¨£¬¼ÆËãÊÔÒºÖÐH2O2µÄÖÊÁ¿·ÖÊý¡£

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5

?H2O2?2nMnO??MH2O245?100%?2?0.02400?36.82?101.010?10.00?3?34.02?100%?0.7441%mÑù

6.13 ³ÆÈ¡Í­¿óÊÔÑù0.6000g£¬ÓÃËáÈܽâºó£¬¿ØÖÆÈÜÒºµÄpHΪ3~4£¬ÓÃ20.00 mL Na2S2O3ÈÜÒºµÎ¶¨ÖÁÖյ㡣1mL Na2S2O3ÈÜÒºÏ൱ÓÚ0.004175g KBrO3¡£¼ÆËãNa2S2O3ÈÜÒºµÄ׼ȷŨ¶È¼°ÊÔÑùÖÐCu2OµÄÖÊÁ¿·ÖÊý¡£ ´ð°¸£º

Óйط´Ó¦Îª£º6 S2O32? + BrO3? + 6 H+ £½ 3 S4O62? + Br- + 3 H2O

2Cu + 2 S2O32? £½ 2 Cu+ + S4O62?

¹Ê£º6 S2O32? ~ BrO3? 6 mol 167.01 g

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c?1?10 0.004175

1?10?167.01

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?CNa2S2O3?6?0.004175?3

?0.1500mol?L?1

?31??Cu2O?2n2?S2O3?M1Cu2O

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mFe2O3?12?6?CCr2O2?7?VCr2O2?7?MFe2O3

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6.15 ³ÆÈ¡º¬ÓÐAs2O3ÓëAs2O5µÄÊÔÑù1.500 g£¬´¦ÀíΪº¬AsO33-ºÍAsO43-µÄÈÜÒº¡£½«ÈÜÒºµ÷½ÚΪÈõ¼î

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?3??1??0.3000?30.00?10?2?3?0.0500?30.00?101.500?1???229.84?2?100%?22.98%

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