At 40 °C, the value of is . What is the pH of a solution at this temperature that has…

CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases

Problem

At 40 °C, the value of

K_w

5.5\times10^{-14}

. What is the pH of a solution at this temperature that has

[OH^-]=4.0\times10^{-7}\,\text{M}

? (a)

7.60

(b)

6.63

(c)

6.86

(d)

6.40