SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An acid with a low pH value
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An acid with a low concentration of hydrogen ions.
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An acid that ionises partially in water.
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An acid that reacts slowly with magnesium
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Detailed explanation-1: -(3) Weak acids are those which do not ionize completely to release Hydrogen ions (H+) when dissolved in water. Since Acetic acid (CH3COOH) is a weak acid, it is weakly or partially ionized in water.
Detailed explanation-2: -A weak acid is an acid which on dissociation in an aqueous solution produces low concentration of H+ ions. Acetic acid (CH3COOH), Formic acid (HCOOH), Carbonic acid (H2CO3) are considered as weak acids.
Detailed explanation-3: -The Ionization of Weak Acids and Weak Bases. Many acids and bases are weak; that is, they do not ionize fully in aqueous solution. A solution of a weak acid in water is a mixture of the nonionized acid, hydronium ion, and the conjugate base of the acid, with the nonionized acid present in the greatest concentration.
Detailed explanation-4: -An acid or base’s strength refers to its degree of ionization. A strong acid will completely ionize in water while a weak acid will only partially ionize. Since there are different degrees of ionization, there are different levels of weakness.
Detailed explanation-5: -A weak acid is an acid that ionizes only slightly in an aqueous solution. Acetic acid (found in vinegar) is a very common weak acid.