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[Chemical Knowledge]：How to detect the hardness of water

Read： 413 Time：20months ago Source：Transform the World with Simplicity

Water is one of the necessary substances in our daily life, but the hardness of water will affect our use and consumption of water. The hardness of water refers to the concentration and type of calcium and magnesium ions contained in water. Generally speaking, the content of calcium and magnesium in hard water is higher, while soft water contains less calcium and magnesium. The characteristic of

hard water is that white scale will remain after using the water. These scales will not only affect our visual experience, but also reduce the quality of water quality. Moreover, hard water will also affect some of the effects in our daily lives, such as using more washing powder to wash clothes, and the skin is easy to dry after bathing.

Therefore, understanding the hardness of water is of great help to our lives. So, how to detect the hardness of water?

In general, we can detect the hardness of water by the following methods:

1. Purchase a test kit for hardness. This is a simple and easy-to-use method for testing the hardness of water. The kit usually includes an indicator and some special dropper. The test method is to add the water sample to a special test tube, and then drop a few drops of reagent from the kit into the test tube to observe whether there is a color change. If there is a change in color, you can determine the hardness of the water according to the instructions on the kit.

2. Let professional institutions detect the hardness of water. Some professional institutions can help test the hardness of water. They have more scientific testing equipment and methods, and can get more accurate test results by testing water samples. The advantage of this method is that the test results are more accurate, more accurate reflection of the content and type of water, can provide a better reference for our lives.

3. The hardness of water is judged by observing the formation and color change of scale. We can observe the formation and color changes of scale by using hard or soft water in a kettle or electric kettle, or using a filter to filter hard or soft water, so as to have a preliminary understanding of the hardness of the water. If there will be more obvious scale in the kettle heated with hard water, the color is white, while there may be no scale or slight scale in the kettle heated with soft water. This method is only a preliminary judgment, the results may not be accurate enough.

understanding the hardness of water is very helpful to our daily life. We can use the above methods to detect the hardness of water in order to choose the drinking water and domestic water that suits us.

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