当前位置：首页>防城港>南宁市2026年初中学业水平考试理化实验操作性考试知识要点及评定记录(学生用)化学科-课题1:粗盐中难溶性杂质的去除

南宁市2026年初中学业水平考试理化实验操作性考试知识要点及评定记录(学生用)化学科-课题1:粗盐中难溶性杂质的去除

  • 2026-06-11 05:07:52
南宁市2026年初中学业水平考试理化实验操作性考试知识要点及评定记录(学生用)化学科-课题1:粗盐中难溶性杂质的去除

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南宁市2026年初中学业水平考试

理化实验操作性考试知识要点及评定记录

（学生用）化学科

课题1：粗盐中难溶性杂质的去除

实验报告

实验内容

分析与判断

1. 称量

用托盘天平称量2g粗盐，将粗盐倒入干净的小烧杯中。

2．量取

用量筒量取10mL蒸馏水，倒入装粗盐的烧杯中。

量液时，视线要与量筒内

保持水平。

3．溶解

用玻璃棒不断搅拌，使粗盐溶解。

用玻璃棒搅拌的目的是

4．过滤

过滤食盐水，仔细观察滤纸上剩余物及滤液的颜色

玻璃棒的作用是

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南宁市2026年初中学业水平考试理化实验操作性考试知识要点及评定记录(学生用)化学科-课题3:二氧化碳的实验室制取

南宁市2026年初中学业水平考试理化实验操作性考试知识要点及评定记录(学生用)化学科-课题5:金属的化学性质

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  139. /yingpanguazai/ssd/ssd1/www/d.460.net.cn/runtime/temp/d9f0991a7dd66afa499551bd49d930d7.php ( 11.98 KB )
  140. /yingpanguazai/ssd/ssd1/www/d.460.net.cn/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000569s ] mysql:host=127.0.0.1;port=3306;dbname=d460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000799s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000294s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000303s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000488s ]
  6. SELECT * FROM `set` [ RunTime:0.000219s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000622s ]
  8. SELECT * FROM `article` WHERE `id` = 498555 LIMIT 1 [ RunTime:0.002253s ]
  9. UPDATE `article` SET `lasttime` = 1781277545 WHERE `id` = 498555 [ RunTime:0.002082s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000272s ]
  11. SELECT * FROM `article` WHERE `id` < 498555 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000563s ]
  12. SELECT * FROM `article` WHERE `id` > 498555 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000414s ]
  13. SELECT * FROM `article` WHERE `id` < 498555 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000809s ]
  14. SELECT * FROM `article` WHERE `id` < 498555 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002951s ]
  15. SELECT * FROM `article` WHERE `id` < 498555 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001012s ]
0.083526s