2. Relevance. Write a balanced equation for the reaction. See that H2O on the left. Calcium oxide +water-->calcium hydroxide. (ii) Write the name and the chemical formula. c . Answer. CaO+H2O-->Ca(OH)2. Reaction 4: Combination of calcium oxide and water 1. Anonymous. Asked by Wiki User. Write the name and chemical formula of the product formed. Solid calcium oxide was taken in a container and water was added slowly to it. ii. Edit: "In left hand side h is 1 while in right hand side h is 2." Add 3 drops of bromothymol blue indicator, and mix by tapping or stirring. 9 years ago. Solid calcium oxide reacts with liquid water to produce calcium hydroxide. State the two observations made in the experiment. 4. Heat is released during exothermic reaction ,rise in temperature is observed. State the 2 observation made in the experiment . When calcium oxide isadded to water it forms calciunhydroxide Called slaked lime. Source(s): University atudent. CaO + H2O ---> Ca(OH)2. How many grams of water are needed to react completely with 25.0 grams of calcium oxide? Half-fill the test tube with distilled water and tap the test tube to mix the reactants. Place a small amount of calcium oxide into a test tube (about 1-2 cm.) asked Feb 7, 2018 in Chemistry by sforrest072 ( 127k points) chemical reactions and equations It would fizz, and then a white precipitate would form. (a O + H₂O -> CaCOH)2 2 B. 102.80g tho How many grams of calcium hydroxide are produced when 87.95 grams of water are used? Solid calcium oxide was taken in a container and water was added slowly to it. i. 0 0. Solid Calcium Oxide was taken in container & water was added slowly to it: (i)State 2 observations made? Favorite Answer. Answer Save. What would be the observations be in an experiment where calcium oxide and water are added together times and temperatures included? 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