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JEE Main20205 Sep 2020Morning ShiftChemistryIonic EquilibriumActual

A soft drink was bottled with a partial pressure of CO 2 of 3 bar over the liquid at room temperature. The partial pressure of CO 2 over the solution approaches a value of 30 bar when 44   g of CO 2 is dissolved in 1   kg of water at room temperature. The approximate pH of the soft drink is ___________ × 10 - 1 . (First dissociation constant of H 2 CO 3 = 4 . 0 × 10 - 7 ;   log 2 = 0 . 3 ; de

Correct answer

0

Step-by-step solution

Amount of CO 2 in one liter of solution = 4 . 4   . = 0 . 1   Mole pH = 1 / 2 pKa - logC For a weak acid solution pH = 1 / 2 6 . 4 + 1 = 3 . 7

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