In general, there are broad two types of water hardness: 1. Carbonate hardness, caused primarily by calcium bicarbonate; 2. Noncarbonated hardness, caused primarily by calcium chloride [CaCl2], magnesium chloride [MgCl2], and magnesium sulfate [MgSO4]. Lime is used to remove carbonate hardness ...
An electronic device for detecting and alarming excessive time caused by water flow Leakage, one Electronic circuits, mounted in a separate housing, total water flow time every 24 hours. The circuit receives information from the water device to the sensor of the counter, which marks any water ...
1. the quality or condition of being hard 2. (Minerals) one of several measures of resistance to indentation, deformation, or abrasion. See Mohs scale, Brinell hardness number 3. (Chemistry) the quality of water that causes it to impair the lathering of soap: caused by the presence of cer...
The hardness of water may be of two kinds,— temporary hardness and permanent hardness. From Project Gutenberg Calcium sulphate, or gypsum, on the other hand, imparts permanent hardness. From Project Gutenberg Permanent hardness is caused by other compounds of lime that are not precipitated by bo...
7.An Investigation Report on the Abnormality of Water Supply Caused by the Changing of Hardness Index一起因硬度指标改变导致自来水水质异常的调查报告 8.The addition of cement or lime hardens the soil and greatly increases its compressive strength.水泥、石灰使土质变硬,从而大幅度增加其压缩强度。 9.Thi...
Therefore, permanent hardness is the sum of magnesium hardness and calcium hardness. Advertisement Corrosionpedia Explains Permanent Hardness There are two major types of water hardness. The first is temporary hardness, caused by increased magnesium and/or calcium hydrogencarbonate. The other is permanent...
Indentation methods ofhardnesstesting comprise two principal groups. 压痕法测定硬度包括两大类. 辞典例句 One property of steel is itshardness. 坚固是钢的特性之一. 辞典例句 Hardnessis caused by divalent metallic cations. 硬度是由一些两价金属阳离子引起的. ...
e.g. he assigned a series of problems of increasing hardness the ruggedness of his exams caused half the class to fail Synonym: ruggedness 3. devoid of passion or feeling hardheartedness Synonym: unfeelingnesscallousnesscallosityinsensibility 4. a quality of water that contains dissolved mineral sal...
Rid your water of hardness, bad taste and odor caused by chlorine, chloramines or organic matter. Ideal for homes on chlorinated, hard municipal water. This one-of-a-kind combination system offers the same high-quality product water of having separate softener and carbon filtration units in a ...
1. Definition of Temporary Hardness: Temporary hardness in water refers to the hardness that can be removed by boiling. It is primarily caused by the presence of certain compounds in the water. 2. Identification of Compounds: The main causes of temporary hardness are the presence of calcium bic...