A soap composition comprises soap as the major constituent and a minor proportion, preferably 5-20% by weight of the composition, of an alkylcarbamylalkane sulphonate of the general formula in which R is a saturated or unsaturated, straight or branched chain alkyl group of 10-18 carbon atoms...
2 hard water does not mix well with soap.A.That is a well-known factB.That is a well-known fact in whichC.It is a well-known fact thatD.It is a well-known that 3___ hard water does not mix with soap .[ ]A.that is a well-known factB.That is a well-known fact ...
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Water hardness that is caused by calcium bicarbonate is known as temporary, because boiling converts the bicarbonate to the insoluble carbonate; hardness from the other salts is called permanent. Calcium and magnesium ions in hard water react with the higher fatty acids of soap to form an ...
Soap residue left on the skin from bathing in hard water can trap bacteria on the skin surface and disrupt the normal balance of microflora. Because the residue inhibits the ability of skin to return to its slightly acidicpH, irritation may occur. ...
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___ hard water does not mix with soap . [ ] A.that is a well-known fact B.That is a well-known fact in which C.It is a well-known fact that D.It is a well known that 查看答案和解析>> 科目:高中英语来源:题型:阅读理解 Water Pollution...
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