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What is the definition of "Enthalpy Change of Formation"

The Enthalpy change when one mole of product is formed from its elements under standard states and conditions.

Answered by Chrisina K. • Chemistry tutor

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Q3. A third beaker, C, contains 100.0 cm^3 of 0.0125 mol/dm^3 ethanoic acid ( Ka = 1.74 × 10^−5 mol/dm^3 at 25 ºC). Write an expression for Ka and use it to calculate the pH of the ethanoic acid solution in beaker C.

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