temporary hardness

简明释义

暂时硬度

英英释义

例句

1.To remove temporary hardness, you can simply heat the water until it boils.

要去除暂时硬度，您只需将水加热至沸腾即可。

2.Using a water softener can help manage temporary hardness in household water supplies.

使用水软化剂可以帮助管理家庭供水中的暂时硬度。

3.You can test for temporary hardness using a simple titration method.

您可以使用简单的滴定法测试暂时硬度。

4.The water in this area has temporary hardness, which means it can be softened by boiling.

这个地区的水具有暂时硬度，这意味着可以通过煮沸来软化。

5.The presence of temporary hardness in your tap water may lead to scale buildup in appliances.

自来水中存在的暂时硬度可能导致电器内部积垢。

作文

Water is one of the most essential resources on our planet. It is crucial for all forms of life, and its quality directly affects our health and environment. One interesting aspect of water chemistry is its hardness, which can be categorized into two types: temporary hardness and permanent hardness. In this essay, I will focus on temporary hardness, which refers to the presence of dissolved minerals in water, primarily calcium and magnesium bicarbonates, that can be removed by boiling. Understanding temporary hardness is important as it has implications for both domestic water use and industrial applications.Temporary hardness occurs due to the dissolution of calcium carbonate and magnesium carbonate in water. When rainwater seeps through soil and rocks, it picks up these minerals, leading to hard water. The term 'temporary' comes from the fact that this type of hardness can be eliminated by heating the water. When boiled, the bicarbonate ions decompose, precipitating calcium carbonate and magnesium carbonate, which can then be removed from the water. This process is reversible; if the water is cooled, the hardness can return as the carbonates re-dissolve.The presence of temporary hardness in water can have both positive and negative effects. On the positive side, the minerals found in hard water can contribute to the dietary intake of calcium and magnesium, which are vital for human health. Many people believe that drinking hard water can help strengthen bones and teeth. Additionally, in some regions, hard water is preferred for brewing beer or making certain types of tea, as it can enhance flavor profiles.However, there are also downsides to temporary hardness. In household settings, hard water can lead to the buildup of scale in pipes and appliances, reducing their efficiency and lifespan. This can result in increased maintenance costs and energy consumption. Moreover, soap does not lather well in hard water, making it less effective for cleaning purposes. This can lead to the need for more soap or detergents, which can be an added expense for households.In industrial contexts, temporary hardness can pose challenges as well. Many manufacturing processes require water with specific hardness levels. For instance, in power plants, hard water can cause scaling in boilers and turbines, leading to operational inefficiencies and increased costs. Therefore, industries often implement water treatment solutions to manage hardness levels, ensuring that they meet the required standards for their operations.To address the issues associated with temporary hardness, several methods can be employed. One common approach is the use of water softeners, which typically operate on the principle of ion exchange. These systems replace calcium and magnesium ions in the water with sodium or potassium ions, effectively reducing hardness. Another method is the addition of chemicals such as lime or soda ash, which can precipitate calcium and magnesium out of the water.In conclusion, temporary hardness is a significant characteristic of water that impacts both personal and industrial uses. While it can offer some health benefits and enhance certain beverages, it also presents challenges that require management. By understanding the nature of temporary hardness and employing appropriate treatment methods, we can ensure that our water remains safe, efficient, and enjoyable for all uses.

水是我们星球上最重要的资源之一。它对所有生命形式至关重要，其质量直接影响我们的健康和环境。水化学的一个有趣方面是水的硬度，它可以分为两种类型：暂时硬度和永久硬度。在这篇文章中，我将重点讨论暂时硬度，指的是水中溶解的矿物质的存在，主要是碳酸钙和碳酸镁的氢氧化物，这些矿物质可以通过煮沸去除。理解暂时硬度很重要，因为它对家庭用水和工业应用都有影响。暂时硬度的产生是由于水中溶解了碳酸钙和碳酸镁。当雨水渗透过土壤和岩石时，它会吸收这些矿物质，从而导致硬水。‘暂时’这个词的来源是因为这种硬度可以通过加热水来消除。当水被煮沸时，氢氧化物分解，沉淀出碳酸钙和碳酸镁，这些可以从水中去除。这个过程是可逆的；如果水被冷却，硬度可能会恢复，因为碳酸盐重新溶解。水中存在暂时硬度可以产生积极和消极的影响。在积极的一面，硬水中的矿物质可以促进钙和镁的摄入，这对人类健康至关重要。许多人相信饮用硬水可以帮助增强骨骼和牙齿。此外，在某些地区，硬水被认为适合酿造啤酒或制作某些类型的茶，因为它可以增强风味特征。然而，暂时硬度也有一些缺点。在家庭环境中，硬水可能导致管道和设备内的水垢积聚，从而降低其效率和使用寿命。这可能导致维护成本和能源消耗的增加。此外，肥皂在硬水中不容易起泡，使其在清洁方面的效果降低。这可能导致家庭需要更多的肥皂或洗涤剂，这可能带来额外的开支。在工业环境中，暂时硬度也可能造成挑战。许多制造过程需要特定硬度水平的水。例如，在发电厂，硬水可能导致锅炉和涡轮机内的水垢形成，从而导致操作效率降低和成本增加。因此，工业通常会实施水处理解决方案，以管理硬度水平，确保它们符合操作所需的标准。为了应对与暂时硬度相关的问题，可以采用几种方法。一种常见的方法是使用水软化器，这些装置通常基于离子交换原理运作。这些系统用钠或钾离子替换水中的钙和镁离子，有效降低硬度。另一种方法是添加化学物质，如石灰或苏打灰，这可以使水中的钙和镁沉淀出来。总之，暂时硬度是水的重要特征，影响着个人和工业用途。虽然它可以提供一些健康益处并增强某些饮品，但它也带来了需要管理的挑战。通过理解暂时硬度的性质并采用适当的处理方法，我们可以确保我们的水在所有使用中都是安全、高效和愉悦的。