31. Leaching of calcium hydroxide is calculated to be 2 * 10 ^-3 cm / yr, also determined to be insignificant. 32. Flowstone may also form on manmade structures as a result of calcium hydroxide being leached from concrete, lime or mortar. 33. The sugar solution is clarified by the addition of phosphoric acid and calcium hydroxide , which combine to precipitate calcium phosphate. 34. Limewater is prepared by stirring calcium hydroxide in pure water and filtering off the excess undissolved Ca ( OH ) 2. 35. Van Erp used concrete from which alkali salts and calcium hydroxide leached and were transported into the rest of the construction. 36. In chewing coca leaves, calcium hydroxide is usually chewed alongside to keep the alkaloid stimulants chemically available for absorption by the body. 37. Calcium hydroxide will readily react with any free CO 2 to form calcium carbonate ( CaCO 3 ) [ Equation 2 ].38. Calcium hydroxide , also known as Milk of lime or limewater, is added to the cane juice to adjust its pH to 7.39. In case of spillage butyryl chloride can neutralized with sodium carbonate ( soda ash ) or calcium hydroxide ( slaked lime ). 40. Tadelakt is thought to have evolved from qadad, a similar plaster treated with calcium hydroxide and oils and fats instead of soaps.