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pH and Acidity Quiz

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Questions and Answers

Who introduced the concept of pH at the Carlsberg Laboratory?

Alice Catherine Evans
Arnold Orville Beckman
Søren Peter Lauritz Sørensen (correct)
William Mansfield Clark

What does the letter 'p' stand for in pH?

puissance
potens
potential (correct)
potenz

What is the mathematical expression for pH?

pH = -log(aH+) (correct)
pH = log(aH+)
pH = -log(1/aH+)
pH = log(1/aH+)

Who invented the first electronic method for measuring pH?

Arnold Orville Beckman (C) Signup and view all the answers

Which of the following correctly defines pH?

pH is a measure of the concentration of hydrogen ions in an aqueous solution. (B) Signup and view all the answers

Which of the following is true about the pH scale?

The pH scale is logarithmic and inversely indicates the activity of hydrogen ions in a solution. (B) Signup and view all the answers

At 25 °C, which of the following pH values indicates a neutral solution?

pH 7 (B) Signup and view all the answers

According to the text, the electrode potential is proportional to pH when pH is defined in terms of activity. Which of the following equations represents this relationship correctly?

$E = E_0 + \frac{RT}{F}pH$ (A) Signup and view all the answers

According to the International Standard ISO 31-8, how is pH precisely measured using a galvanic cell?

By measuring the electromotive force (e.m.f.) between a reference electrode and a hydrogen-ion selective electrode (C) Signup and view all the answers

According to the equation $pH(X) = pH(S) + \frac{E_S - E_X}{z}$, what does 'z' represent?

The number of electrons transferred (B) Signup and view all the answers