初三化学练习册 答案(上海)（The answer to the first three chemical workbooks (Shanghai)）.doc

初三化学练习册 答案(上海)（The answer to the first three chemical workbooks (Shanghai)） The answer to the first semester of ninth grade 1. Chemistry 1.1 chemistry makes the world a better place (a) 1. (1) emit dazzling white light, leaving white powder (2) clarification of the lime water turbidity (3) generate large amounts of bubbles 2. Magnesium belt combustion produces new substances that are chemical changes, and physical changes may also have luminescence 3 ~ 7 C, C, C, C, C, BC Every one of them is a good man 9. (1) no chemical changes have occurred. Because the water in the sea is evaporated, the salt is precipitated out. (2) there was no chemical change. Because the candle melts and vaporizes does not produce new material. (2) 1. Silver and white solid emits dazzling white light, leaving white powder white oxide powder B 2. 3. B 4. (1) the test tube clip will be burned with the tube clip (2) the experiment time of the beaker is too long to be obvious (3) the glue head dropper is in the tube with the glue head dropper 5. B 6. A. It is difficult to clarify the turbidity of lime water and calcium carbonate calcium carbonate 8. Calcium carbonate produces a large number of bubbles of carbon dioxide 9. B 10. The BC 11. Garbage classification name Specific garbage (filling number) Organic waste 4 5 9 10 metal plastic harmful recycled 1 7 June 11 8 2, 3, 12. A little Enter the chemistry lab (a) 1 ~ 5 B C D D AD The solution turns red and the solution is red and colorless Blue and blue precipitation disappears Reignite oxygen with a Mars bar 9. BD The formation and dissolution of the gas generation precipitation by the change of color 11. Experimental results of experimental results of experimental experiments (2) 1. (1) test tube beaker with a round bottom flask cone (2) a, b, d, b, d 2. C 3. AB 4. (1) the alcohol on the wick will not easily ignite and waste alcohol (2) the liquid will overflow (3) a large amount of heat will explode at the bottom of the cylinder (a) the cork i