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21.2.3.pH4.1.2.3.4.1.2.3.12pHpHpHpH2[]?[)12[][]()(1)10mL(2)2[]1.2[][]??[][](FLASH)NaOH+HCI=NaCl+H2O[]Ca(OH)2+2HCl=
CaCl2+2H2O2NaOH+H2SO4Na2SO4+2H2O[][][][]()·[]12[][]123(NH3·H2O)[]?[][]3[][]Ca(OH)2+H2SO4=CaSO4+2H2O[]Al(OH)3[]Al(OH)3+3HCl=A1C13+3H2O[]?[][][]52123[
][]?[]pHpH014[][]——pH1pHpHo14pH<7pH>7pH7[]pH[]1pH3…………………………………………………………()ABC2pH2933()A.BCD3pH………………………………………………()ApH14BpH=7CpH1DpH0[)1A2B3D[]pH
pH?[]pHpH[]pH[]pH14114pH[]2pHpH[]()pHPHpHpH.(1)pHpHpHPH(2)pH()pHpH[]pHpH[][)[]pH?[][]--pH[)3[]1pH2pH773pH(pH56pH56)4pH[]pH?[]pH7357456671
O91566—767]7375—8O47844684[][]?[][][]()(1)()5(2)5pH30min(3)pHpH=1pH=4pH=7pH=10pH=13[][]??[][]12(pH4555)3[]?[][]—pHpH[]pH95
pH5[]1234——pH1.pHpH014pH<7pH>7pH=72pHpH3