Question

3.) At a temperature of 40 °C pKw = 13.542. a. Why is pKw ?14.00 at 40 °C? b. What is the neutral pH of water at 40 °C? c. What are the values of [H3O+] and [OH] at this temperature? d. Is water more acidic, more basic, or neither, at 40 °C? Explain. 4.) Show the derivation of the weak acid approximation for calculating [H3O+]. Explain the basis of this shortcut.

          3.) At a temperature of 40 °C pKw = 13.542.
a. Why is pKw ?14.00 at 40 °C?
b. What is the neutral pH of water at 40 °C?
c. What are the values of [H3O+] and [OH] at this temperature?
d. Is water more acidic, more basic, or neither, at 40 °C? Explain.
4.) Show the derivation of the weak acid approximation for calculating [H3O+]. Explain the
basis of this shortcut.

3.) At a temperature of 40 °C pKw = 13.542.
a. Why is pKw ?14.00 at 40 °C?
b. What is the neutral pH of water at 40 °C?
c. What are the values of [H3O+] and [OH] at this temperature?
d. Is water more acidic, more basic, or neither, at 40 °C? Explain.
4.) Show the derivation of the weak acid approximation for calculating [H3O+]. Explain the
basis of this shortcut.

Added by James G.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert David Collins

07/08/2022

Step 1

542 instead of 14.00 because the autoionization of water is temperature-dependent, and the equilibrium constant Kw changes with temperature. Show more…

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3.) At a temperature of 40 °C, pKw = 13.542. a. Why is pKw not 14.00 at 40 °C? b. What is the neutral pH of water at 40 °C? c. What are the values of [H3O+] and [OH-] at this temperature? d. Is water more acidic, more basic, or neither at 40 °C? Explain. (-) Pts Ref. (+) N #(s) 4.) Show the derivation of the weak acid approximation for calculating [H3O+]. Explain the basis of this shortcut.