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19 Ιουν 2021 · In chemistry, a base is a substance that reacts with acids to form a salt and which releases hydroxide ions, accepts protons, or donates electrons in aqueous solution. Learn about the properties of bases and see examples of bases and their uses.
A base is a substance that forms hydroxide ions OH-when dissolved in water. For example, hydrochloric acid (\(\ce{HCl}\)) is an acid because it forms \(\ce{H^{+}}\) when it dissolves in water. \[\mathrm{HCl}(\mathrm{g}) \stackrel{\text { Water }}{\longrightarrow} \mathrm{H}^{+}(\mathrm{aq})+\mathrm{Cl}^{-}(\mathrm{aq})\nonumber\]
Bases are defined as chemical substances that tend to donate electrons, release hydroxide ions (OH – ions), and/or accept protons (H + ions) when dissolved in water. Some notable types of bases include Lewis bases, Bronsted-Lowry bases, and Arrhenius bases.
3 Οκτ 2024 · base, in chemistry, any substance that in water solution is slippery to the touch, tastes bitter, changes the colour of indicators (e.g., turns red litmus paper blue), reacts with acids to form salts, and promotes certain chemical reactions (base catalysis).
A base is a molecule or ion able to accept a hydrogen ion from an acid. Acidic substances are usually identified by their sour taste. An acid is basically a molecule which can donate an H + ion and can remain energetically favourable after a loss of H +. Acids are known to turn blue litmus red.
29 Σεπ 2022 · Updated on September 29, 2022. In chemistry, a base is a chemical species that donates electrons, accepts protons, or releases hydroxide (OH-) ions in aqueous solution. Bases display certain characteristic properties that can be used to help identify them.
In the more general Brønsted–Lowry acid–base theory (1923), a base is a substance that can accept hydrogen cations (H +)—otherwise known as protons. This does include aqueous hydroxides since OH − does react with H + to form water, so that Arrhenius bases are a subset of Brønsted bases.
18 Αυγ 2023 · Base in Chemistry are those compounds that turn red litmus blue and when reacted with acid they neutralize the reaction to give salt and water. The pH value of the base is greater than 7. Bases are bitter in taste and slippery in touch. The bases which are soluble in water are called Alkalis.
Acids, bases and alkalis are found in the laboratory and at home. Acids and bases can neutralise each other. A base that can dissolve in water is also called an alkali.
Bases have properties that mostly contrast with those of acids. Aqueous solutions of bases are also electrolytes. Bases can be either strong or weak, just as acids can.
