1、 1 6 1. (C4H5O5Na) 1 2 C:H:O:Na= 3 5 85g (NaCl) ?( ) 2. 6% KNO3 1 KNO3 2 KNO3 3 KNO3 4 150kg KNO3 kg 3. Al2O3 1 Al2O3 2 Al2O3 3 Al2O3 0.1% 4. 60% 50g ( ) A 6g B 8g C 13.2g D 20g 5. 0.3gH2 0.1g (1) (2) 6. 11 0.1% ( CaCl2 + Na2CO3 = CaCO3 + 2NaCl) 2 7. 100g 100g 195.6g 15.6g 1 2 0.1% 8. AgNO3 7.3% 50.
2、0 g AgNO3 HCl AgCl HNO3 Ag 108 1 1 AgNO3 _ 2 AgNO3 3 9. 15g 23.3g NH4 2SO4+BaCl2=BaSO4 +2NH4Cl 10. 2.96g 3 11. 20g 80g 1 n 2 3 12. 0.003g CaO2 2CaO2+2H2O=2Ca(OH) 2+O2 1 2 2.88g 200L ( ) 13. N2 0.44 g 10% g 14. 6.5g7.3g 9.0g 9 Mg(OH)2+2HCl=MgCl2+2H2O 0.001 15. 13.6g 7.3% 4 (1)100g (2) 16. (1) _ (C6H1
3、005)n C H O _( ) (2) NaOH _ NaOH l 6 9 8 t(H2SO4 20 ) ?( ) 17. 2016 98.5g 100g 10% A 12.5% B 19.7% C 20% N D 25% 18. 2016 NaCl AgNO3 NaCl NaCl A 10% B 20% C 30% D 40% 19. 2015 100g 2 5g 1 2 /g 0 50 50 /g 5 3 2 A 1 B 2 C 50g 1g D 40% 20. 2016 10 50 g 5 11.5 g NaCl 64.3 g 1 2 3 6 1.(1)156 (2)48:5:80:2
4、3 (3)5.85g NaCl 5.85g 23/58.5 l00 2.3g 5.85g C4H5O5Na 5.85g (23/156) 100% 0.86g 5.85g NaCl C4H5O5Na 2.3g 0.86g=1.4g 5.85g NaCl 1.4g 2. 1 2 101 3 39 14 48 4 9 3. 1 2:3 2 9:8 3 52.9% 4.B 5. 1 x Fe+2HCl=FeCl2+H2 56 2 X 0.3g 56 x= 2 0.3g x=8.4g 2 = 0.1g8.4g+0.1g 100% 1.2% 6. x CaCl2 + Na2CO3 = CaCO3 + 2
5、NaCl 106 100 x 5.0g x = 5.3g 70.7% 7. 100g + 100g - 195.6g = 4.4g : Na2CO3 x y Na2SO4 z Na2CO3 + H2SO4 = Na2SO4 + H2O + CO2 106 98 142 44 x y z 4.4g 7 x=10.6g y=9.8g z=14.2g 10.6g+ 15.6g-14.2g =12g 8. 1 170 2 50.0 g AgNO3 x a AgNO3 HCl AgCl HNO3 170 143.5 x 2.87 g 143.5 x 170 2.87 g x 170 2.87g 143.
6、5 3. 4 g 1 a 3.4g 50.0g 100% 6.8% 3 HNO3 y b AgNO3 HCl AgCl HNO3 143.5 63 2.87 g y 143.5 y 63 2.87 g y 63 2.87g 143.5 1.26 g 50.0 g 10.0 g 2.87 57.13 g b 1.26g 57.13g 100% 2.2% 9. NH4 2SO4 X NH4 2SO4 + BaCl2 BaSO4 + 2 NH4Cl 132 233 X 23.3g X 13.2g NH4 2SO4 NH4 2SO4 13.2/15x100%=88% 88% 96% g x 4 . 4
7、 44 106 g y 4 . 4 44 98 g z 4 . 4 44 142 % 8 . 9 % 100 100 8 . 9 g g % 3 . 88 % 100 12 6 . 10 g g 8 10. x Ca OH 2+ CO2=CaCO3 +H2O 74 44 2 96g x 74 44=2.96g x x=1.76g 1.76g 11.(1 6.8 2 66% 3 20 5 x CaCO3 + 2HCl CaCl2+H2O+CO2 100 73 5g 20g x 100 73 5g 20g x x 18.3% 18.3% 12. 1 2 2.88gCaO2 O2 x. 2CaO2
8、+ 2H2O = Ca(OH)2 + O2 144 32 2.88 g x 32 144 = x g 88 . 2 x=0.64g 0.64g 200L=0.0032g/L 0.0032g/L0.003g/L 13.(1) 2 x CO2 + 2NaOH =Na2CO3 + H2O 9 44 80 0.44 x x 80 44 . 0 44 x=0.8g (3) 8g 14. m Mg(OH)2 + 2HCl = MgCl2 + 2H2O 58 2 36.5 0.145 2 3 m 58/0.145 2 3=2 36.5/m m=1.095g =9.0g 1.095g=7.905g 7.905
9、g 7.3g 15. 1 7.3g 2 X Y Z Na2CO3 + 2HCl = 2NaCl + CO2 + H2O 106 73 117 44 X 7.3g Y Z 106 : 73= X: 7.3g X=10.6g 73 : 117= 7.3g : Y Y=11.7g 73 : 44= 7.3g : Z Z= 4.4g =( 11.7+3)g/(13.6+100-4.4)g = 13.5% 16. 1 36:5:30 2 pH 2 1 9 8 t 2O =1.96 t 2 x H2SO4 + 2NaOH Na2SO4 + 2H2O 98 80 142 1.96 t x 1.6 98 80 =1.96 t x 1.6 x= 100 t 10 17. D 18.B 19.C 20. 1 0.5 g 10+50 g+11.5 g-64.3 g=2.2 g 2 x NaHCO3+HCl=NaCl+H2O+CO2 84 44 x 2.2 g 84/X=44/2.2g x =4.2 g =84% 3 64.3 g- 5 g-4.2 g =63.5 g
