Carbon dioxide and water form carbonic acid. Alkaline salts such as sodium bicarbonate are added to soda water to reduce its acidity. The sodium, potassium, or other metallic salts in soda water can neutralise a little of the acidic flavour of some drinks, such as cocktails made with orange juice.
The pH of soda water is between 3 and 4.
The pH of soda water is between 3 and 4.
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