1、 2 pH ( 10 , 4 , 40 ) 1. pH 5.8 3.1 3.4 7.6, ( ) A. B. C. D. A pH7 , , , 2. ( ) A. B. C. D. B A. , , ;B. , , ;C. , , , ;D. , , 3.(2016 ) , , , : NaOH , ( ) A. B. C. D. B , , NaOH , 4. , ( ) A.pH=2 B.pH=7 C. pH 5 2, D.pH10 , C ,pH=7 , ;pH7 , , pH , ;pH7, ( ) , pH ( 7 (3) pH B ,C , pH :(1) (2) (3)B C
2、12.(8 )(2016 ) : (1) : , ; , (2) , Ca(OH)2 , , (3) , X , X A. B.CuO C.Na2CO3 D.Ba(NO3)2 (1) , , , ;(2) , , , , ;(3) , , , , ; H2SO4 NaOH , CuO ,CuO H2SO4 CuSO4,CuSO4 NaOH Cu(OH)2 , NaOH , ; , H2SO4 NaOH , Na2CO3 , Ba(NO3)2 :(1) (2) (3)A B 13.(8 ) 10 mL NaOH ( ) , pH ( pH ) pH, : /mL 0 2 4 6 8 10 12
3、14 pH 12.9 12.7 12.5 12.3 11.9 7.0 2.1 1.9 (1) mL ,NaOH (2) 3 mL , ; 14 mL , (3) pH=2.1 , : : 10 mL , , ; 3 mL , , ; 14 mL , , ; 12 mL ,pH=2.1, , :(1)10 (2) (3) 14.(8 )(2016 ) X Y , ,Y pH A B C D X Y (1) ( ) , (2) m , (1) pH 7, pH 7, , C ;(2)m , CaCl2 HCl :(1)C pH 7, pH 7 (2)HCl CaCl2 pH (1) pH , 7,
4、 7, A (2) pH , , 7, B (3) ,pH , 7, 7, C (4) pH , , 7, D ( 2 , 18 ) 15.(9 ) , , 2 mL , 2 , , , , , , , , . ( ) , , ( ) ; , , , , ; , , , , ; , , : 2NaOH+H2SO4 Na2SO4+2H2O , ( ) 16.(9 )(2015 ) , , , , , (1) (2) : (A) CaCl2 Ca(OH)2 (B) CaCl2 (C) CaCl2 HCl CaCl2 , , , (A), (A) , , : , (B) (C) (C) , ( ) A. , B. , C. , pH , pH7 D. , , (1) ;(2) , Ca(OH)2 CaCl2, , CaCl2 HCl, , , , , CaCl2 , , HCl,CaCl2 :(1)Ca(OH)2+2HCl CaCl2+2H2O (2) ( , ) D ( 1 , 12 ) 17. , , 2% ( ) 50 g , 2% , 7.3 g, , , , : 50 g x HCl + KOH KCl + H2O 36.5 56 7.3 g 2% x
