Water · 水
| English | 中文 | Pinyin · 拼音 |
|---|---|---|
| water treatment/ˈwɔːtə ˈtriːtmənt/ | 水处理 | shuǐ chǔ lǐ |
| filtration/fɪlˈtreɪʃn/ | 过滤 | guò lǜ |
| chlorination/ˌklɔːrɪˈneɪʃn/ | 氯消毒 | lǜ xiāo dú |
Pure enough to drink
- Clean water is essential for life, but natural water is full of dissolved and suspended substances.
- Making it safe involves water treatment 水处理 and testing.
足够纯净可以喝
- 清洁的水对生命至关重要,但天然水充满溶解的和悬浮的物质。
- 使它安全涉及水处理(water treatment)和测试。
Water treatment lab · 水处理实验室
Classify water processes by what they remove or change. · 根据去除或改变的物质对水处理过程进行分类。
Chlorine is added during water treatment to: · 在水处理过程中加入氯气是为了：
Chlorination sterilises the water. · 氯化法可消毒水。
Filtration removes solid particles from water. · 过滤可从水中去除固体颗粒。
It removes insoluble solids. · 它可去除不溶性固体。
Water treatment
- Filtration 过滤 removes solid particles.
- Chlorination 氯消毒 (adding chlorine) kills harmful microbes (sterilisation).
Treating water to make it safe to drink: sedimentation, filtration, carbon, then chlorination
水处理
- 过滤(filtration)移除固体颗粒。
- 加氯(chlorination,加氯)杀死有害的微生物(消毒)。
处理水使它安全可饮:沉淀、过滤、碳,然后加氯
Anhydrous copper sulfate turns which colour in the presence of water? · 无水硫酸铜遇水会变成什么颜色？
White anhydrous copper sulfate turns blue with water. · 白色无水硫酸铜遇水变蓝。
Cobalt chloride paper turns from blue to ______ in the presence of water. · 氯化钴试纸遇水会从蓝色变为______。
A test for the presence of water. · 一种检测水存在的测试。
Testing for water
- To test that a liquid is water: it turns anhydrous copper sulfate from white to blue, or cobalt chloride paper from blue to pink.
- To test it is pure water: it boils at exactly 100 °C and freezes at 0 °C.
测试水
- 要测试一种液体是水:它把无水硫酸铜从白色变成蓝色,或把氯化钴纸从蓝色变成粉色。
- 要测试它是纯水:它恰好在 100 °C 沸腾并在 0 °C 冷冻。
At what temperature (°C) does pure water boil at normal pressure? · 在常压下，纯水的沸点是多少（°C）？
Pure water boils at exactly 100 °C. · 纯水在恰好 100 °C 时沸腾。
"Is water" vs "is pure"
- A chemical test shows a liquid contains water.
- Only the boiling/freezing point shows it is pure water (no dissolved substances).
"Contains water" is not the same as "pure water". Sea water turns cobalt chloride paper pink (it contains water) but is far from pure. Purity is shown by a sharp boiling point of 100 °C.
"是水"对"是纯净的"
- 一个化学测试显示一种液体含有水。
- 只有沸点/冰点显示它是纯水(没有溶解的物质)。
"含有水"与"纯水"不同。 海水把氯化钴纸变成粉色(它含有水)但远非纯净。纯度由 100 °C 的一个明确的沸点显示。
You've got it
- water treatment: filtration (removes solids) + chlorination (kills microbes)
- test for water: anhydrous copper sulfate white → blue, or cobalt chloride blue → pink
- only the boiling point (100 °C) shows water is pure
你掌握了
- 水处理:过滤(移除固体)+ 加氯(杀死微生物)
- 测试水:无水硫酸铜白 → 蓝,或氯化钴蓝 → 粉
- 只有沸点(100 °C)显示水是纯净的