CO 2 (g) + H 2 O(l) → H 2 CO 3 (aq) Lime water neutralizes the carbonic acid and carbonate ion is formed. Word equation: Octane + Oxygen = Carbon Dioxide + Water Balanced equation: 2 C8H18 + 25 O2 = 16 CO2 + 18 H2O Octane, combusts with oxygen to form carbon dioxide and water. Carbon dioxide, also commonly known by its chemical formula CO 2, is one of the major building blocks of life.It is usually found in its gaseous form, and is a major part of the plant and animal life cycle. Lime Water Breath Experiment Using lime water is a fun and easy way to test for the presence of carbon dioxide. Add 50 ml of lime water to two 100 ml beakers. Carbon dioxide reacts with limewater to form calcium carbonate, which precipitates out of the solution. carbon dioxide + calcium hydroxide (limewater) → calcium carbonate + water Procedure: 1. Blowing more carbon dioxide into the lime water turns the water acidic, which dissolves the calcium carbonate again. Carbon dioxide(CO2) + Lime Water[Ca(OH)2] → Calcium Carbonate(CaC03) + Water(H2O) Log in Ask Question Home Science Math History Literature Technology Health Law Business All Topics Random The exhaled carbon dioxide is used to produce a precipitate of calcium carbonate with the lime water. during respiration. CO 2 is consumed by plants in photosynthesis and is produced by animals (like us!) The reaction between limewater, which is a solution of calcium hydroxide, "Ca(OH)"_2, and carbon dioxide will result in the formation of an insoluble solid called calcium carbonate, "CaCO"""_3. What is the word equation for the experiment which lime water is tested to produce carbon dioxide? Action/Explanation: Formula: When carbon dioxide dissolves in water, it forms carbonic acid. 2.