MethodTake moist blue litmus and red litmus paper near the gas that is rushing out as soon as the cap of a bottle of soda water or any other cold drink is opened. What change took place? Discuss the reason for this happening in class.
Do not skip the word moistA dry strip gives almost nothing. The gas has to dissolve in the film of water on the paper before it can become an acid there, so wet both strips with plain water and shake off the drips before you begin.
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