permanent hardness stalna tvrdoća Permanent hardness in water is hardness due to the presence of the chlorides, nitrates and sulphates of calcium and magnesium, which will not be precipitated by boiling. The lime scale can build up on the inside of the pipe restricting the flow of water or...
hardness n.[U] 坚硬,困难,严厉,勇气 Permanent a. 永久的,不变的,固定的,持久的 n. 电烫的头发 a. 永久的 permanent adj. 1. 永久的,永恒的,长久的,长期的 2. 不大可能改变的 n. 1. 烫发 (= permanent wave) water n. 1. 水,雨水,海水,水位,水面,流体,水域 v.[T] 1. 浇水,供以水...
permanent-hardness-of-water网络水的永久硬度网络释义 1. 水的永久硬度 为永久硬度,permanent... ... ) permanent hardness of water 永久硬度 ) permanent hardness of water 水的永久硬度 ... www.dictall.com|基于1 个网页© 2024 Microsoft 隐私声明和 Cookie 法律声明 广告 帮助 反馈...
Temporary hardness of water : The temporary hardness of water is due to the presence of carbonates and bicarbonates of magnesium and calcium in water. This hardness is also called as the carbonate hardness. By boiling this water… View the full answer ...
Temporary hardness is less detrimental because it can be eliminated through boiling. However, permanent hardness can be removed only by means of chemical treatment. Permanent hardness in water can damage piping, boilers as well as other pressurized systems. Hard water tends to form scale deposits th...
The meaning of PERMANENT HARDNESS is the part of the total hardness of water that persists after boiling —distinguished from temporary hardness.
The hardness of water persisting after boiling. McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc. Want to thank TFD for its existence?Tell a friend about us, add a link to this page, or visitthe webmaster's page for free ...
Switch tonew thesaurus Noun1. permanent tooth- any of the 32 teeth that replace the deciduous teeth of early childhood and (with luck) can last until old age adult tooth tooth- hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense ...
3) permanent hard water 永久硬水4) permanent hardness of water 永久硬度5) permanent hardness 为永久硬度6) permanent hardness 永久硬度<冶>补充资料:为永久硬度 分子式:CAS号:性质:又称为永久硬度。由硫酸钙、氯化钙等微溶于水,加热水时不产生沉淀的无机化合物构成的水硬度。 说明:补充资料仅用于...
Spatial prediction of temporary and permanent hardness concentrations in groundwater based on chemistry parameters by artificial intelligencedoi:10.1007/s13762-023-04934-5Mousavi, M.Qaderi, F.Ahmadi, A.International Journal of Environmental Science & Technology (IJEST)...