Asked by mike
When CO2 is dissolved in water, it forms carbonic acid; this lowers the pH and causes BTB to change color.
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True.
CO2 dissolves in water and establishes the equilibrium CO2(aq) + H2O ⇌ H2CO3 ⇌ H+ + HCO3−. The produced H+ lowers the pH, and bromothymol blue (BTB) responds by shifting from blue/green toward yellow as the solution becomes more acidic.
CO2 dissolves in water and establishes the equilibrium CO2(aq) + H2O ⇌ H2CO3 ⇌ H+ + HCO3−. The produced H+ lowers the pH, and bromothymol blue (BTB) responds by shifting from blue/green toward yellow as the solution becomes more acidic.
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