In this actitivity you must choose the correct option
What is the pH of a 0,001 M NaOH at 25ºC?
11
13
9
3
A saturated solution of magnesium hydroxide, contains 0.1166 g of this component in 10 L of solution. In this solution the magnesium hydroxide is fully dissociated into ions. Which one of the following is the pH of a solution of magnesium hydroxide containing 4,0 × 10^5 mol L of hydroxide ions at 298 K? (Kw = 1.0 × 10–14 mol2 dm–6 at 298 K)
9,6
9,5
8,6
8,3
In an aqueous solution of sodium hydroxide, Which answer could be true ?
[Hydronium ion]>[Hydroxide ion]
pH=2
pH=-log[OH-]
pH=12,8
At 50°C, the ionic product of water, Kw, has the value 5.48 × 10^–14 mol^2 dm^–6. What would be the pH of water?
7,0
7,2
6,6
7,5
What would be the pH at 25 ºC of a 0,150 mol dm^3 of sodium hydroxide? The kw is 1,00 x 10 -14 mol^2 dm^-6 at 25ºC.