A 49.0 mL sample of a 0.472 M aqueous nitrous acid solution is titrated with a 0.335 M aqueous potassium hydroxide solution. What is the pH after 42.9

Which of the following describes qualitative data? a) recording the temperature of a solid as it is warmed. b) noting the color of a solution as it is heated. c) measuring the volume of an object by water displacement. d) taking the mass of an object using a balance.