The ionic product of water, Kw=2.40×10−14 mol2 dm−6K_w = 2.40 \times 10^{-14}\text{ mol}^2\text{ dm}^{-6}Kw=2.40×10−14 mol2 dm−6 at physiological body temperature (37 ∘C37\ ^\circ\text{C}37 ∘C).
Which is the correct expression for KwK_wKw?
Calculate the pH of pure water at 37 ∘C37\ ^\circ\text{C}37 ∘C. Give your answer to two decimal places.
Suggest why this pure water at 37 ∘C37\ ^\circ\text{C}37 ∘C is neutral.
Calculate the pH of a 0.0120 mol dm-3 solution of barium hydroxide at 37 ∘C37\ ^\circ\text{C}37 ∘C. Give your answer to two decimal places.
The 0.0120 mol dm-3 barium hydroxide solution at 37 ∘C37\ ^\circ\text{C}37 ∘C was a saturated solution. A student added 0.0120 mol of strontium hydroxide to 1.00 dm3 of water at 37 ∘C37\ ^\circ\text{C}37 ∘C and stirred the mixture until no more solid dissolved. Predict whether the pH of this strontium hydroxide mixture is larger than, smaller than, or the same as the pH of the barium hydroxide solution. Explain your answer.
