How to detect hard water

Hard water will have an adverse effect on washing. If the water quality is too poor, it must be softened. Whether the water meets the requirements after softening can be inspected at any time. The inspection methods are as follows: 1. Identification method of hard water and soft water Pour the water into a test tube , add a small amount of prepared transparent soap solution, shake while adding, if the aqueous solution is clear, and the generated foam does not disappear after standing for 5 minutes, it can be judged as soft water, otherwise it is hard water. 2. Identification method of temporary hard water and permanent hard water Heat and boil an appropriate amount of water in a beaker, stand still for a few minutes, and observe whether there is precipitation in the water. If there is precipitation in the water, judge the water sample as temporary hard water; Pour the water into the test tube, add a small amount of the prepared soap solution, and shake while adding. If the water becomes cloudy and the foam formed quickly disappears after shaking, it can be judged as permanently hard water. 3. Identification method of calcium salts Pour an appropriate amount of water into a test tube, add a few drops of ammonium oxalate and ammonium chloride, and heat it. If a white precipitate appears, it can be judged that there is calcium salt in the water. 4. Identification method of magnesium salts Pour an appropriate amount of water into the test tube, add a few drops of disodium hydrogen phosphate and ammonia water, if there is a white crystal precipitate, it can be judged that there is magnesium salt in the water. 5. Identification method of iron content Pour an appropriate amount of water into an evaporating dish, when heated to dryness, add a few drops of hydrochloric acid and nitric acid, and then add an appropriate amount of potassium ferricyanide, if the solution turns blue, it can be judged that there is Iron is present. If the water quality in your area is poor and there is no conditions for softening and treating water, I recommend you to use a combination of washing and care, softening care, one toss clean, and a Jingliang laundry detergent pods that solve all laundry problems.
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