Initially 0.400 moles of HNO2 and 0.300 moles of NaNO2 are dissolved in water to a volume of 240 ml.
Please show all calculations
A. What is the pH of the buffer?
B. 240 mL of water is added to the buffer. What is the pH after the addition of the water?
C. After the addition of the water, the volume is now 480 mL. To this solution, we add 20.0 mL of 5 molar NaOH. What is the pH of the buffer now?
D. What would be the pH after an addition of 60.0 ml of the 5.00 molar NaOH was added to the solution formed in part C?