To test for carbon dioxide in the air, you can use the following indicators:
1. Limewater: Carbon dioxide reacts with limewater (calcium hydroxide solution) to form a white precipitate of calcium carbonate. This is a common and reliable test for the presence of carbon dioxide.
2. Universal Indicator: While not specific for carbon dioxide, universal indicator can be used to detect the presence of carbon dioxide by observing a color change in the indicator solution.
3. Cobalt Chloride Paper: This paper changes color in the presence of water vapor or carbon dioxide. It turns from blue to pink when exposed to carbon dioxide, indicating its presence.
These indicators provide different methods to detect the presence of carbon dioxide in the air through specific reactions or color changes. Each indicator offers a unique way to confirm the presence of carbon dioxide based on its distinctive properties.
