Q6- When carbon dioxide is passed through lime water, A) Calcium hydroxide is formed B) White precipitate of CaO is formed C) Lime water turns milky D) Color of lime water disappears. B. formation of water soluble calcium bicarbonate. If you continue to bubble CO2 through the mixture then the precipitate redissolves and a colourless solution is formed again... CaCO3(s) + H2O(l) + CO2(g) ----> Ca(HCO3)2(aq) The same reaction that occurs in nature to produce temporarily hard water. A saturated solution of calcium hydroxide in water is known as lime water. Octane (C8H18 ) reacts with oxygen (O2) to form carbon dioxide (CO2) and water (H2O). When carbon dioxide is passed through lime water GC Metals Non-Metals When carbon dioxide is passed through lime water, the solution turns milky, but, on prolonged passage, the solution turns clear. When carbon dioxide is passed through a freshly prepared solution of lime water, then it turns milky due to the formation of calcium carbonate, which is insoluble in water. That's the equation you're expecting. Ca(OH)2 +CO2 âCaCO3 +H2 O. When carbon dioxide is passed through lime water, it turns milky due to formation of white precipitate in form of calcium carbonate. When the equation below is balanced, the coefficient of water is: C8H18 + O2 â CO2 + H2O carbon dioxide is passed through lime water equation; Uncategorized. (ii) Sulphur dioxide (SO 2 ) gas when passed through acidic potassium permanganate solution (purple in colour) turns it â¦ When excess of carbon dioxide is passed through lime water, the milkiness first formed disappears due to: A. the reversible reaction taking place. C a ( O H ) 2 + C O 2 â C a C O 3 ( + ) + H 2 O IOf C O 2 is passed for longer period, turbidity disappears due to form of soluble calcium bicarbonate. November 28, 2020; 0 Likes; 1 View; Following is the chemical equation for the reaction Ca(OH)â + COâ â CaCOâ + HâO When C O 2 passes through lime water, it turns into milky lime water due to formation of insoluble calcium carbonate. The equation is balanced as written. C. huge amount of heat evolved during the reaction. This chemical change can be written in the form of word equation as follows: When carbon dioxide gas is passed through lime water, then calcium hydroxide combines with carbon dioxide to form a white solid substance, calcium carbonate which makes lime water milky. SO2 is much like CO2. They both dissolve in water and they both form fictitious acids. Q7- When crystals of lead nitrate are heated strongly in a dry test tube A) Crystals immediately melt B) A brown residue is left C) White fumes appear in the tube This is because. Pretty simple, right? carbon dioxide is passed through lime water equation. Adding more carbon dioxide results in the precipitate dissolving to form a colourless solution of calcium hydrogencarbonate. the calcium carbonate formed initially is converted to soluble calcium bicarbonate on passage of more carbon dioxide When CO 2 gas is passed in excess through lime water, milkiness disappears due to formation of soluble calcium hydrogen carbonate.