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关于2026年晋江初三质检化学试卷的几点思考

  • 2026-03-30 00:31:21
关于2026年晋江初三质检化学试卷的几点思考
以下纯属个人观点，
如有不对之处，请批评指正。
Q1:11.(2)点铜的熔点真的比纯锡低吗？
以下是豆包查询结果：
当铜含量只有10%时，
“点铜”的熔点227℃比纯锡的熔点232℃低了5℃，
好像不足以称之为优点；
而且当铜含量逐渐升高时，
“点铜”的熔点要高于纯锡。
Q2:14.(2)验证土壤浸出液显酸性的方法靠谱吗？
参考答案：①取样，加入紫色石蕊，溶液变红；
②用玻璃棒取样，滴到pH试纸上，对比标准比色卡，读出pH<7；
③加入镁、锌、铁等活泼金属（钾、钙、钠除外），产生气泡；
④加入碳酸钙等碳酸盐，产生气泡；
⑤加入氧化铁或氧化铜（氧化铝除外）， 固体溶解；
问题来了：假如土壤浸出液为弱酸性，上述方法还靠谱吗？
紫色石蕊试液的变色范围大约为5.0~8.0，
不过，很显然，这是高中知识。
但“钾、钙、钠能与水反应”、
“氧化铝能与碱反应”也是高中知识。
另外，pH试纸只能粗略测定，
弱酸也不一定能与上述物质反应或者现象极不明显。
如果要较真的话，恐怕只有pH计或传感器才可以吧？！
Q3:15.(3)海水制氢图中是否少画了一个氢分子？
理论上，氢分子的个数是氧分子的两倍。
于是，有的同学画了1个氢分子和1氧分子。
但方框是画在另一个电极上的，
无法给分，甚是可惜。
Q4:15.(4)氯化钙真的不会随氯化钠结晶而析出吗？
同一温度下，氯化钙的溶解度远大于氯化钠，
它还随着温度的升高显著增大；
且量少不易达到饱和状态。
然而，当水分被蒸干或残留液过少时，
氯化钙照样会随着氯化钠结晶而析出！
我认为应该写“不易”析出更为恰当。
Q5:16.(4)参考答案中对作品评价是否中肯？
参考答案如下（尽说优点，不说缺点）：
作品1：净化水的常见操作需要消耗能量吗？
用了这么多个塑料瓶真的环保吗？
我个人认为：变废为宝、能初步净化水、装置一体化（优点）
瓶下部没有透气孔过滤速度慢、容易散架、不便多次重复使用（缺点）
作品2：这套装置容易散架、漏气，供氧真的稳定吗？
我个人认为：变废为宝、能控制供氧速率（优点）
容易散架、容易漏气、双氧水消耗量大（缺点）
作品3：操作简便吗？现象明显吗？节约资源吗？一体化了吗？
我个人认为：变废为宝、能同时制取和验证二氧化碳的性质（优点）
容易散架、容易漏气、右边导管末端应置于高低蜡烛火焰中间位置（缺点）
Q6:17.吧赤铁矿低温磁化焙烧成磁铁矿的资料来源准确吗？
上图为17题部分截图，
下2图为咨询豆包截图。
我个人比较疑惑的地方有：
①反应原理中的生成物是一氧化碳还是二氧化碳？
②如果装置内有氧气是否会导致爆炸？
③能否用二氧化碳代替氮气或惰性气体？
④“温室效应”这个专有名词能用“全球气候变暖”代替吗？
我记得有一年规定不可以！
欢迎评论区补充讨论或批评指正。
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  1. CONNECT:[ UseTime:0.000402s ] mysql:host=127.0.0.1;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000563s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000282s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000272s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000467s ]
  6. SELECT * FROM `set` [ RunTime:0.000192s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000508s ]
  8. SELECT * FROM `article` WHERE `id` = 470700 LIMIT 1 [ RunTime:0.000681s ]
  9. UPDATE `article` SET `lasttime` = 1774815065 WHERE `id` = 470700 [ RunTime:0.002978s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000321s ]
  11. SELECT * FROM `article` WHERE `id` < 470700 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000519s ]
  12. SELECT * FROM `article` WHERE `id` > 470700 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001312s ]
  13. SELECT * FROM `article` WHERE `id` < 470700 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000649s ]
  14. SELECT * FROM `article` WHERE `id` < 470700 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000761s ]
  15. SELECT * FROM `article` WHERE `id` < 470700 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002666s ]
0.094701s