Chemistry
State your observations and give balanced equations of the reactions when carbon dioxide is passed through clear lime water (a) for a short time (b) for a long time.
Practical Chemistry
11 Likes
Answer
(a) When carbon dioxide is passed through lime water for a short time, it turns lime water milky. This is due to the formation of insoluble calcium carbonate.
Ca(OH)2 + CO2 ⟶ CaCO3 ↓ + H2O
(b) When the gas is passed for a long time, the milkiness disappears. This is due to the formation of a soluble bicarbonate.
CaCO3 + CO2 + H2O ⟶ Ca(HCO3)2 [soluble]
Answered By
6 Likes
Related Questions
Explain the following :
A white crust forms on the surface of lime water that has been exposed to the atmosphere.
Give the biological importance of carbon dioxide dissolved in water.
XCl2 is the chloride of a metal X. State the formula of the sulphate and the hydroxide of the metal X.
Complete the following 'word' equations. Write the words 'No reaction' if none occurs.
(a) magnesium + copper sulphate ⟶
(b) iron (II) sulphide + hydrochloric acid ⟶