Acids, bases and Salts

Question

Explain why does coffee taste bitter even though it's an acid?

Answer 1

Chlorogenic acids have an impact on the bitter taste later on. Chlorogenic acid degradation products make up 60 – 70 % of the bitter taste in coffee. With up to 13% in raw coffee, these polyphenols play an essential role in the formation of all kinds of flavour-and-taste-active compounds in coffee. Besides, recent research shows that chlorogenic acids have all kinds of health beneficial effects such as reducing blood pressure, improving glucose regulation thus being Diabetes Type II preventive, as well as being anti-inflammatory. 

Answer 2

Caffeine is alkaline in nature even though Coffee is a weak acid, its pH value is around 5. And the pH value varies from one to other coffee beans. Because of presence of ingredients it may have bitter taste.

Comments

Isn't it due to the lesser concentration of  hydrogen or hydonium ion ?