What is the ph level of a cup of coffee?

Answer 1

The approximate pH level for a good cup of coffee is between 4.9 and 5.2.

Chlorogenic acids (quinic, caffeic, and pyridine-3-carboxylic acids) can greatly affect the pH of coffee. During the roasting process, changes occur in these acids. The percent of chlorogenic acids in an Arabica bean changes from 3.77 (green bean), to 2.74 (light roast), to 2.16 (medium roast), to 0.93 (dark roast). Phosphoric acids on the other hand, is considered by some researchers to be the major source of acidity in coffee. It is influenced by the method and severity of roasting, the method of extraction or brewing, and the brew water used. A pH of 4.9 to 5.2 is the preferred range for a "good cup of coffee."

Answer 2

Coffee grounds are a low-level source of nitrogen, having a fertilizer value of around 2.0-0.3-0.2, as well as a minor source of calcium and magnesium. Post-brewed coffee grounds are reported to be slightly to highly acidic, depending on the source, but no more so than peat moss. So, one could apply them to the soil for acid-loving plants, such as rhododendrons, azaleas and blueberries, etc. Or, you could spread them out over a larger garden area to minimize the pH effect. It's difficult to make a specific recommendation for an application rate, but it's always better to err on the lighter side, since the pH can be variable. A rate of 10 pounds (dry weight) per 1000 square feet would be conservative. TO ANSWER YOUR QUESTION, MORE SPECIFICALLY: Composting is also an excellent method to recycle the grounds, which have a carbon-to-nitrogen ratio of around 20:1. Use the grounds as you would green, leafy material, mixing with some dry, brown plant materials in the compost. The Environmental Protection Agency suggests adding no more than 25 percent volume coffee grounds. WORM COMPOSTERS report that coffee grounds are an excellent food source for the little critters. Again, be sure to MIX THE GROUNDS with brown materials (like soggy leaves), even in the worm bin.

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Answer 3

About 5. Depends on coffee

Answer 4

That would depend on the coffee itself. It is a bit different with each type, roast and such. You may be able to find that info on this site. Also I found a neat blog you might like.

Answer 5

That would depend on the coffee.....some coffee beans have a higher acidity than others.....need more info.......try the following links

Answer 6

what is the ph value of blood,coffe,dishwashing liquid? thank you ate lhen ^_^

Answer 7

4.5 ?