1、 1 1 2 1 2 1 2 3 4 5 1. ( ) 2. ( ) 3. 2 1. 2. = 3. ( ) 4. + = 1. 100 3 (1) (2) (3) ( ) (4) ( ) 2. = / 100% (1) (2) (3) 1 - C6H8N2 A B 6 8 2 C 108 D 3 4 1 2 ZnO H2SO4 +ZnO=ZnSO4+ H2O 4 1 _ 2 100g 1% 10% 3 50kg 80.5kg 3 AgNO3 7.3% 50.0 g AgNO3 HCl AgCl HNO3 Ag 108 1 1 AgNO3 _ 2 AgNO3 3 4 15g 23.3g NH4
2、 2SO4+BaCl2 =BaSO4 +2NH4Cl 5 20g 80g /g /g 1 20 15 (NH 4 ) 2 SO 4 96% XX 5 2 20 10 3 20 6.8 4 20 n 1 n 2 3 6 13.6g 7.3% (1)100g _ (2) 6 1 A C6H8N2 A B 6 8 2 B C 12 6+8+14 2=108 C D = 12 6 8 14 2 =18 2 7 D D 2. 1 65 : 32 : 64 2 x 100g 1%+x=(100g+x) 10% x=10g 3 y ZnO + H2SO4 = ZnSO4 + H2O 81/161=y/80.
3、5g y= 40.5kg 3. 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 143.5 3. 4 g 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 7 50.0 g 10.0 g 2.87 57.13 g b 1.26g 57.13g 100% 2.2% 4. NH4 2
4、SO4 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% 5. 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% 6. 1 7.3g 2 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%
