To prepare hard water, simply dissolve calcium and magnesium salts like calcium chloride or magnesium sulfate in regular water. The concentration of these salts determines the hardness of the water. The dissolved salts will increase the mineral content of the water, making it hard.
very hard
No. Hard water is water with high amounts of dissolved calcium and magnesium.
water gas is prepared by steam over white hot coke
Hard water is produced when water passes through rocks and soil that contain high levels of minerals such as calcium and magnesium. These minerals dissolve into the water, making it "hard" by causing issues such as soap scum buildup and reduced lathering of soaps and detergents.
Hard water contain calcium bicarbonate, magnesium bicarbonate in temporary hard water and calcium/magnesium sulfate in permanent hard water. Soft water contain doesn't contain these substances or only in very limited concentations.
very hard
you have to study really hard
Work hard and eat your wheaties
Train long and hard.
Take algebra and study very hard.
To work hard with consistency
Put water in it
study hard
Rivers are fresh water.
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by hard working
study hard