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Class 10 Exam  >  Class 10 Questions  >  Formula of potassium sulphate.k2so4 or kSo4? Start Learning for Free
Formula of potassium sulphate.k2so4 or kSo4?
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Most Upvoted Answer
Formula of potassium sulphate.k2so4 or kSo4?
K2SO4
Community Answer
Formula of potassium sulphate.k2so4 or kSo4?
K2SO4.Bcoz charge on SO4 ion is -2.
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Read the given passage and answer the question :A sample of water which gives lather with soap with difficulty is known as hard water, while a sample of water which gives lather with soap easily is known as soft water. Hardness of water is due to the presence of bicarbonates, sulphates and chlorides of calcium and magnesium. Hardness of water is of two types, temporary and permanent hardness. When hardness of water is due to the presence of bicarbonates of magnesium and calcium, it is called temporary hardness. When hardness of water is due to the presence of sulphates and chlorides of magnesium and calcium, it is called permanent hardness.The amount of hardness causing substances in a certain volume of water measures the extent of hardness or degree of hardness. Hardness of water is always calculated in terms of calcium carbonate although it is never responsible for causing hardness of water because of its insoluble nature. The reason for choosing calcium carbonate as the standard for calculating hardness of water is the ease in calculation as its molecular weight is exactly 100. Degree of hardness is usually expressed as parts per million (ppm).Q. “A student requires hard water for an experiment in his laboratory which is not available in the neighbouring area. In the laboratory there are some salts, which when dissolved in distilled water can convert it into hard water. Select from the following groups of salts, a group, and each salt of which when dissolved in distilled water will make it hard.”

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Formula of potassium sulphate.k2so4 or kSo4?
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