Lime water: Is calcium hydroxide solution

Lime water is calcium hydroxide solution. 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. This chemical change can be written in the form of word equation as follows: Full syllabus notes, lecture and questions for NCERT Solutions for Class 7 Science Chapter 2 Exploring Substances: Acidic, Basic and Neutral - Class 7 - Plus excerises question with solution to help you revise complete syllabus for Science (Curiosity) Class 7 - New NCERT - Best notes, free PDF download Activity 2.1: Let us explore Collect samples of lemon juice, soap solution, amla juice, tamarind water , vinegar, baking soda solution, lime water , tap water , washing powder solution, sugar solution, and salt solution. Take a strip of blue litmus paper and cut it into small pieces. Spread these pieces on a clean and dry white tile. Using a dropper, put one drop of each of the samples, one-by-one, on these litmus paper pieces, as shown in Fig. 2.2a. (i) When C O 2 is passed through lime water for a short duration, it turns lime water milky due to the formation of a white precipitate of calcium carbonate.