At 50 C, the ion-product constant for H 2 O has the value K w = 5.48

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At 50 °C, the ion-product constant for H2O has the value Kw = 5.48 x 10-14

(a) What is the pH of pure water at 50 °C? 

(b) Based on the change in Kw with temperature, predict whether ΔH is positive, negative, or zero for the autoionization reaction of water:

2H2O(l) ⇌ H3O+(aq) + OH-(aq)

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Chemistry The Central Science

ISBN: 978-0134414232

14th Edition

Authors: Theodore Brown, H. LeMay, Bruce Bursten, Catherine Murphy, Patrick Woodward, Matthew Stoltzfus

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