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查看: 1039|回复: 6
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hjghfyjfyifufuoo 本帖最后由 cindyliong 于 23-1-2014 04:28 PM 编辑
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发表于 30-11-2013 12:03 PM
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可以把题目打出来吗？拍照或scan也行，
我可以帮你找答案咯~
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发表于 30-11-2013 01:50 PM
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好像是直接dissolve salt in water, observe the changes就可以了
problem statement:are all salts soluble in water? |
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楼主 |
发表于 30-11-2013 01:57 PM
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Swatyin 发表于 30-11-2013 01:50 PM
好像是直接dissolve salt in water, observe the changes就可以了
problem statement:are all salts solub ...
我原本procedure 是写加sodium hydroxide 不过后来想下是dissolve in water 就也是大概写一下然后在observe
change. Procedure 我是写are all sulphate salt dissolve in water |
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发表于 30-11-2013 09:15 PM
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If I gave a wrong example of insoluble sulphate salt , is it all of the experiment will get 0 mark ?
Or the marker only potong the marks that I gave wrong ? |
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楼主 |
发表于 1-12-2013 12:33 AM
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dexter1228 发表于 30-11-2013 09:15 PM
If I gave a wrong example of insoluble sulphate salt , is it all of the experiment will get 0 mark ? ...
如果你problem statement 其他statement 没写到错的example 的
话应该不会吧 |
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发表于 13-12-2013 04:16 PM
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你可以参考pahang trial哦
因为题目比较相似
这个experiment也算是历年来较简单的
另外,必须提供各两个sulphate salt that soluble in water and insoluble in water.
所以procedure只是把不同的salt放进水里,搅拌一下。
观察它是soluble还是insoluble就可以了 本帖最后由 雨停江南 于 13-12-2013 04:20 PM 编辑
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