Методическая разработка урока химии в 8 классе на тему "Реакции обмена"

Вариант 1. Задание 1. Ответы к заданиям Приложение 2 →  1. 2Na + Cl2  →  2Ag + Br 2. 2AgBr  → K2S +2 HCl  → Fe2O3+3H2  2 Fe + 3H  2KCl + H 2O  2NaCl                                                                                                                                     2                                                                                                                                  3. 2S                                                                                                                        4.  Задание 2: 4) 1, 2, 4.  Задание 3: 2) 3.  Вариант 2. Задание 1.                                                                                                                                       2→ Al2O3                                                                                                                                     1. 4Аl + 3O2   Al→ 2O3 + 3Cu                                                                                                                     3. 2. 3CuO + 2Al  → K2S O4+ BaCl2  4                                                                                                                   4. 2Fe(OH)3   Fe→ 2O3 + 3H2  2KCl + BaSO Задание 2: 2) 1, 4, 2.  Задание 3: 3) 3.   2KCl + H Вариант 3. Задание 1.                                                                                                                                      → 1. K2O + 2HCl  2O                                                                                                                         →  2CuO                                                                                                                                         2. 2Cu + O2  → 3. Mg(HCO3)2  3 + 2CO2 + H2O                                                                                                           MgCO → 3)2 + 2Ag 4. Fe +2AgNO3  Fe(NO  Задание 2: 4) 2, 3, 4.               Задание 3: 1) 1.