What did you observe when you blew exhaled air into the clear lime water?

The carbon dioxide in the exhaled air reacts with the lime water and calcium carbonate is formed, which turns the lime water milky. Q3. Statement 1- Lime water turns milky when air is passed through the solution. Statement 2- Air contains carbon dioxide which turns lime water milky.

What is the clear solution of calcium hydroxide?

Limewater
Limewater is the common name for a dilute aqueous solution of calcium hydroxide. Calcium hydroxide, Ca(OH)2, is sparsely soluble at room temperature in water (1.5 g/L at 25 °C). “Pure” (i.e. less than or fully saturated) limewater is clear and colorless, with a slight earthy smell and an astringent/bitter taste.

What happens when calcium reacts with slaked lime?

CaO+H2O→Ca(OH)2. When slaked lime is added in water it turns into a suspension which is called “milk of lime”. Also, from above it is cleared that calcium oxide and water react to form ‘calcium hydroxide or slaked lime’.

What happens when CO2 is passed through slaked lime type of reaction?

Explanation: When CO2 is passed through Slaked lime we will observe a milky solution. This is due to the insoluble suspension of calcium carbonate formed: Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l).

What happens if lime water is exposed to air?

Quicklime is unstable and reacts, often very rapidly, with water to form calcium hydroxide. This process produces heat and is known as hydration. When exposed to the atmosphere this calcium hydroxide can react again by absorbing carbon dioxide from the atmosphere to once again become calcium carbonate.

What happens to clear lime water when carbon dioxide is present?

Carbon dioxide reacts with limewater (a solution of calcium hydroxide, Ca(OH) 2), to form a white precipitate (appears milky) of calcium carbonate, CaCO 3. Adding more carbon dioxide results in the precipitate dissolving to form a colourless solution of calcium hydrogencarbonate.

Why calcium hydroxide is called slaked lime?

Slaked lime is an inorganic compound whose chemical formula is Ca(OH)2. Its IUPAC name is calcium hydroxide. As it is produced by slaking quicklime (calcium oxide CaO) with water, that’s why it is called slaked lime.

What type of reaction is formation of slaked lime?

The formation of slaked lime (calcium hydroxide, Ca(OH)2) when water is added to lime (CaO) is exothermic. CaO(s) + H2O (l) → Ca(OH)2(s) This reaction occurs when water is added to dry portland cement to make concrete, and heat evolution of energy as heat is evident because the mixture becomes warm.

Which substance will be formed when slaked lime reacts with CO2 give formula of slaked lime?

If CO2 is passed through slaked lime(calcium hydroxide Ca(OH)2). Reaction:::: CO2 + CA(OH)2—-> CaCO3+ H2O. It gives out calcium carbonate (CaCO3) also called as marble/limestone. Hope this helps u.

When carbon dioxide gas is passed through slaked lime why it gets turned into milky write the reaction also involved in it?

When carbon dioxide is passed through lime water, it turns milky due to the formation of calcium carbonate. Calcium carbonate precipitates as a milky white precipitate.

When a colorless gas A is passed through slaked lime?

When a colourless gas ‘A’ is passed through slaked lime, a white substance ‘B’ is formed, ‘B’ is a water insoluble substance used as a building material, when ‘B’ is. reacted with dilute HCl it again produces gas ‘A’.