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Modified method of the preparation of isoeugenol through isomerization of eugenol in the presence of 4 times theoretical amount of KOH with eugenol type basil oil as the starting material is stated.

本文叙述以丁香罗勒油为原材料用4倍理论量为催剂进行异构异丁香酚改进方法。

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When the plants are under water for this length of time they have enough water availability for a long enough period of time to completely rehydrate.

泡到水里这么长时间,他们就有足够水分来供应给空凤在未来很长段时间合反应.

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CNN 10 学生英语 2022年2月合集

A Russian YouTuber created a hydrogen and oxygen burner.

位俄罗斯油管明了氢氧结合光剑。

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Scishow 精选系列

Technically speaking, an alcohol is any compound that contains a hydrogen-oxygen pair, known as a hydroxyl group, that's bound to an atom of carbon that's saturated, meaning all of its electrons are bound to something else.

严格说来,含有氢氧化合物东西都是酒精,也就是我们所熟知氢氧基,粘着在饱和碳原子上,也就是意味着所有电子都粘着在另外东西上。

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科学大揭秘

However, in terms of general usage, the word 'bleach' is used to refer to common household bleach, which consists of 3-8% sodium hypochlorite and trace amounts of sodium hydroxide.

法而言,“漂白剂”词是指普通家漂白剂,由3-8%次氯酸钠和微氢氧化钠组成。

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TED演讲(视频版) 2023年11月合集

We refine them, so we get them into the form that we need for the production -- salts for nickel, cobalt and manganese, or hydroxides for lithium.

我们对它们进行精炼,以便将其制成生产所需形态——镍、钴和锰盐,或者锂氢氧化物。

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博兹曼科学——化学

Did you learn that neutrality, in other words a pH of 7 requires the concentration of the hydronium and the hydroxide ions to be equal?

您是否知道中性(即 pH 值为 7)要求水合氢离子和氢氧离子浓度相等?

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经济学人 Science and technology

This is done by soaking them in water or brine or brine followed by a solution of sodium hydroxide known as lie.

这是通过将它们浸泡在水中或盐水中,然后再为碱液氢氧化钠溶液来完成

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米德尔马契(

Here would be another light, as of oxy-hydrogen, showing the very grain of things, and revising all former explanations.

这将是另光, 如氢氧,显示事物本质, 并修正所有以前解释。

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SciShow - Chemistry

See, a few of the molecules in water split up into positively-charged hydrogen ions and negatively-charged hydroxide ions.

你看,水中有几个分子会分解成带正电氢离子和带负电氢氧根离子。

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SciSHow 快问快答小科普

It either grabs hydrogen off of other molecules, or forms hydroxide ions that can grab free hydrogen ions.

它要么从其他分子中夺取氢, 要么形成可以夺取游离氢离子氢氧根离子。

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English Learning for Curious Minds

Normally the command module would produce water as a by-product of its hydrogen and oxygen fuel cells.

通常情况下,指令舱会通过氢氧燃料电池副产品生成水。

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化学 Crash Course

So that's like, 294 Kelvin, and now I shall add my 100 mL of sodium hydroxide.

所以那是大约294开尔文,现在我将加入100毫升氢氧化钠。

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化学 Crash Course

(mumbling) And now I'm going to put the same amount of sodium hydroxide solution.

(咕哝着)现在我要加入相同氢氧化钠溶液。

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SciShow - Chemistry

You could technically have an even higher pH. A really high concentration of sodium hydroxide in water can have a pH of 15, which means there’s only 1 hydrogen ion for every 100 million hydroxide ions.

理论上你可以拥有更高pH值。水中极高浓度氢氧化钠可以达到pH 15,这意味着每1亿个氢氧根离子中只有个氢离子。

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博兹曼科学——化学

And if we add more hydroxide to it it will push it more towards the right.

如果我们添加更多氢氧化物,它会将其推向更右侧。

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博兹曼科学——化学

In other words we have too much sodium hydroxide.

换句话说, 我们有太多氢氧化钠。

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SciShow - Chemistry

If the solution has a pH of 7, it means that there are an equal number of these hydrogen and hydroxide ions.

如果溶液pH值为7,这意味着氢离子和氢氧根离子相等。

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SciShow - Chemistry

But when a compound is higher on the pH scale — and therefore more basic — that means it’s more likely to bond with the hydrogen ions, shifting the balance so there are more hydroxide ions.

但当化合物在pH尺度上更高——也就是说更碱性时——这意味着它更有可能与氢离子结合,从而使平衡偏向于产生更多氢氧根离子。

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博兹曼科学——化学

You can see that they're all going to be hydroxides formed by combining with atoms from group I and group II.

您可以看到,它们都是由 I 族和 II 族原子结合形成氢氧化物。

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博兹曼科学——化学

That means we have 1 mole of sodium hydroxide for every liter of solution.

这意味着每升溶液中含有1摩尔氢氧化钠。

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博兹曼科学——化学

Since it's 1 times 10 to the negative 14th, then we can just figure out that the concentration of hydronium and hydroxide therefore must be 1 times 10 to the negative 7th.

因为它是 1 乘以 10 负 14 次方,所以我们可以算出水合氢离子和氢氧离子浓度因此必定是 1 乘以 10 负 7 次方。

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