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Which chemical reaction occurs when you mix vinegar (acetic acid) and baking soda (sodium bicarbonate)?
Oxidation
Precipitation
Neutralisation
Combustion
Neutralisation
The reaction between vinegar and baking soda is a classic acid-base neutralization reaction. The acetic acid acts as the acid, while sodium bicarbonate acts as a weak base, reacting to form salt, water, and carbon dioxide gas.
The reaction between vinegar and baking soda is a classic acid-base neutralization reaction. The acetic acid acts as the acid, while sodium bicarbonate acts as a weak base, reacting to form salt, water, and carbon dioxide gas.
Think of it like a 'chemical explosion' in a miniature kitchen volcano, where the fizzing is simply the rapid release of gas bubbles trapped in the liquid, much like the carbonation in a soft drink.
AB-SG (Acid + Base = Salt + Gas)
CH3тАЛCOOH+NaHCO3тАЛтЖТCH3тАЛCOONa+H2тАЛO+CO2тАЛтЖС тАФ The complete balanced chemical equation for the reaction.
The chemical reaction proceeds in two steps: first, a double displacement (acid-base) reaction forms sodium acetate and carbonic acid. The unstable carbonic acid (H2тАЛCO3тАЛ) immediately decomposes into water and carbon dioxide gas, which causes the observed bubbling or effervescence.
Vinegar is a dilute solution of acetic acid (CH3тАЛCOOH).
Baking soda is chemically known as sodium bicarbonate (NaHCO3тАЛ).
The reaction is endothermic in terms of immediate heat sensation, though primarily characterized by gas evolution.
The bubbles produced are carbon dioxide (CO2тАЛ) gas.
Safe for kitchen science demonstrations
Uses non-toxic, household reagents
Not a true 'neutralization' in the sense of reaching a pH of 7, as the resulting solution may remain slightly acidic or basic depending on the ratio used.
Leavening agent in baking (releasing CO2тАЛ to make dough rise)
Cleaning agent for unclogging drains
Standard vinegar contains approximately 5% acetic acid by volume.
Option A (Oxidation) is incorrect because there is no change in oxidation states. Option B (Precipitation) is incorrect as all products (sodium acetate, water, CO2тАЛ) do not form a solid precipitate in this aqueous environment. Option D (Combustion) is incorrect as this reaction does not require oxygen or produce flames.
C is correct тАФ Mixing vinegar and baking soda undergoes an acid-base neutralization reaction resulting in the release of carbon dioxide gas.
In competitive exams, remember that any reaction involving a metal carbonate/bicarbonate and an acid will always release CO2тАЛ gas, often used as a test for carbonates.
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