There are a few questions that I've been trying to find the answer to but to no avail ):
Please help!
1) What mass of sodium nitrite must be added to 250 mL of a 0.200 M nitrous acid solution to make a buffer with pH = 3.00?
a. 30.90 g
b. 1.54 g
c. 3.44 g
d. 1.07 g
2) (Points: 1)
How...