Observing Properties of Acids and Bases

Taste (but remember in the lab, you test, not taste ) Sour Bitter 

Feel on the skin Produces a painful sensation Feels slippery 

Reactions Reacts with certain metals (magnesium, zinc, and iron) to produce hydrogen gas Reacts with limestone and baking soda to produce carbon dioxide Reacts with oils and greases Reactwith acids to produce a salt and water 

Reaction with litmus paper Turns the paper red Turns the paper blue 

Here s how the Bronsted-Lowry theory defines acids and bases  

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Table 10.2 on the next page summarizes the observable properties of acids and bases. These observable properties include their physical characteristics and their chemical behaviour. The Express Lab on page xxx provides you with an opportunity to compare some of these properties. What are acids and bases, however How does chemical composition determine whether a substance is acidic or basic You will consider one possible answer to this question starting on page 373. 

Table 10.2 Some Observable Properties of Acids and Bases... 

Obtaining evidence for theories - observable properties of acids and bases have led to the modification of acid-base theories... 

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