Example Question #2 : Reactions And Equilibrium
A scientist makes a solution by adding 0.2 grams of to enough water so that the resulting solution has a volume of 10 liters. What, approximately, is the pH of this solution?
has a molar mass of 20 g/mol, meaning that there is 0.01 mol of it in the solution. Sodium hydroxide is a strong base and completely dissociates in water. Its concentration in the solution is . This means that the concentration of ions is and . Thus, the pH of the solution is 11.