(4)(KIO3)

0.01 molL1KIO3()/mL0.01 molL1Na2SO3/mLH2O/mL//s15V135252554025355V20

__________________V2________mL.(5)(Ce)CeCl3CeCl3CeCl36H2ONH4ClNH4Cl________(6)H2O2pH3Ce3Ce(OH)4

(1) (2)20

(3) () (4)()40 (5)HClCeCl3() (6)21626H

(1)P15 (2)P4O10P51 mol P420 mol(3)Na2S2O3b molL1V2 103LV2b103molI20.5V2b103molI2a molL1V1 103LV1 a 103molI2V1a 103mol0.5 V2b 103molCV1a 103mol0.5 V2b 103mol(V1a0.5 V2b)103mol

(4)1223V2403(5)CeCl3CeCl33H2O Ce(OH)33HClNH4ClHClCeCl3(6)pH3HH2O2O122Ce342Ce3H2O26H2O===2Ce(OH)46H

20103 1500 mLBaCl2KCl5a molb mol()A0.1(b2a)molL1B10(2ab)molL1C10(ba)molL1 D10(b2a)molL1

0.7300.482(2011138)

2()1 g 98%4 g19.6%10%90%50%80 mL18.4 molL120 mL3.68 molL15x%x%3x%A B C D

1(1)

(2)2(1)n()n()

(2) CuH2O2HNO3

1 H3AsO3SnCl23Sn22H3AsO36H18Cl==2As3SnCl62-6M()H3AsO3ClAs1 mol As3 molMOHSnCl62-ABC D

B SnCl2SnCl62-SnCl2SnCl62-H3AsO3AsAsH3AsO31 mol As3 molClMH2O

(NaClO3)()ACl1BNaClO3HClCNaClO3D22.4 L1 mol

A ClO2Cl4O2AClO22NaClO34HCl()==2NaCl2ClO2Cl22H2OBCD