查询词典 sulfuric acid

Results The major occupational hazards in the expansion project were sulfuric acid, hydrochloric acid, ammonia, sodium hydroxide, cyanide, nickel and its compounds, formaldehyde, organic solvent and noise. Many protective measures would be carried out in this expansion projects.

结果该建设项目在生产过程中存在的主要职业病危害因素有硫酸、盐酸、氨、氢氧化钠、氰化物、镍及其化合物、甲醛、有机溶剂、噪声等，根据有关规定企业拟采取相应的措施。

The oxides are sulfur dioxide and sulfur trioxide, which when dissolved in water make sulfurous acid and sulfuric acid, respectively.

硫的氧化物有二氧化硫和三氧化硫，溶于水中时分别形成亚硫酸和硫酸。

The oxides are sulfur dioxide and sulfur trioxide, which when dissolve d in water make sulfurous acid and sulfuric acid, respectively.

硫的氧化物有二氧化硫和三氧化硫，溶于水中时分别形成亚硫酸和硫酸。

The oxide s are sulfur di oxide and sulfur tri oxide , which when dissolved in water make sulfurous acid and sulfuric acid, respectively.

硫的氧化物有二氧化硫和三氧化硫，溶于水中时分别形成亚硫酸和硫酸。

Unstable when heated in the air quickly oxidized iron tetroxide, dissolved in hydrochloric acid, sulfuric acid generated ferrous salt.

不稳定，在空气中加热时迅速被氧化成四氧化三铁，溶于盐酸、稀硫酸生成亚铁盐。

The influences of reaction temperature and sulfuric acid concentraction on trichloroethylene conversion and chloroacetic acid recovery have been investigated.

研究了三氯乙烯水解法生产氯乙酸的工艺，并在两种不同的实验方案中考察了反应温度、硫酸浓度对三氯乙烯转化率和氯乙酸收率的影响并确定了适宜的工艺参数，可作为工业化生产研究的基础。

Compared to DNPH, reactivity was reduced for all carbonyl compounds investigated but could be enhanced significantly by using the strong Lewis acid boron trifluoride hydrate instead of sulfuric acid as catalyst in the same concentration.

比起化妆，羰基化合物被全部反应性降低，但可以提高调查显强刘易斯用硼酸氟化水合物代替硫酸作为催化剂，在同一浓度。

This article analyses some basic conceptions that are comparatively vayue or even wrong wrong in the teaching of middle school chemistry, like the definition of chemical change, the influence of concentration on a chemical reaction , the structure of oxacid,and the acidity of sulfuric acid, the acidity of carbonic acid, and the conversion of allotropic substance.

分析了中学化学教学中的几个比较模糊甚至错误的基本概念，如化学变化、浓度对化学反应速度的影响、含氧酸的结构、硫酸的酸性、碳酸的酸性、热化学方程式的表示法、同素异形体间的转化等，并从大学化学角度加以澄清，以便使大一学生更准确地理解和掌握这些基本概念。

And so, reuse of these sulfuric acid, hydrochloric acid and ammoniacal nitrogen in the production process will evidently decrease production cost, which shows good economic effects, furthermore, it will decrease salts and even waste water discharge, which shows good social effects.

因此综合回收这部分硫酸、盐酸及氨氮化合物并回用于生产过程，无疑可以降低生产过程的原材料消耗，从而降低生产成本，提高经济效益，而且可以大大减少无机盐甚至废水的排放量，其社会效应也是不言而喻的。

If even a trace of benzilic acid remains the sulfuric acid will turn red.

如果即使是微量的benzilic酸是硫酸将变成红色。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失