Alkali compounds are a type of base that dissolves in water; many types of bases do not dissolve in water, and so they are not alkali. Any type of base reacts with acid and neutralizes it. Most alkali compounds contain a hydroxyl group, which is a negative ion containing bonded oxygen and hydrogen.Know More
Bases and alkali substances are very common in both the natural environment and in daily use. Most toothpastes contain mild alkali substances, and baking soda is another alkali substance commonly encountered. Ammonia is an exception to the common pattern for alkali substances, as it is a water-soluble base without a hydroxyl group. Copper oxide is a relatively common base that is not water soluble, and thus it is not an alkali.
Any basic substance has a power of hydrogen, or pH, above 7.0, the pH of pure water. Acidic substances have a pH of below 7.0. Basic substances are basic because they are capable of accepting hydrogen ions, and hydrogen ions are what give acids their caustic properties. In the case of many alkali substances, the hydrogen ions bond with hydroxyl ions to create water. The non-hydroxyl portions of the bases often form salts with the remnants of the acids. In the case of ammonia, the hydrogen ion is accepted to form ammonium.Learn more about Acids & Bases
Some common examples of acid-base indicators include blue grapes, which can change color from deep red in an acid to violet in a base; beets, which change from red to purplish when in a very basic substance; and blueberries, which turn red in strong acids. While these are common examples, many other things can be used as an acid-base indicator.Full Answer >
Caffeine is a base. It occurs naturally in the leaves, fruits or seeds of over 60 plants worldwide, including coffee beans, cacao beans, kola nuts and many tea plants. In its purified form, it is a bitter white powder with the chemical formula C8H10N4O2.Full Answer >
Some of the properties of acids are that they conduct electricity when they are dissolved in water, liberate hydrogen when they react with active metals and, when combined with a base, will produce a salt and a neutralized base. Acids also have a pH which is less than 7 in an aqueous solution, and will change the color of blue litmus paper to red. In an operational sense, acids increase the concentration of H+ ions when they are dissolved in water.Full Answer >
Monopotassium phosphate, with the chemical formula KH2PO4 or H2KO4P, is neither a base nor an acid but a salt. A salt, usually in crystalline form, is produced via an acid-base chemical reaction. Monopotassium phosphate is the neutralized product of phosphoric acid and potassium hydroxide.Full Answer >