Question:
A chemistry graduate student is given 100. mL of a 1.10 M
Last updated: 8/2/2022
A chemistry graduate student is given 100. mL of a 1.10 M nitrous acid (HNO₂) solution. Nitrous acid is a weak acid with K =4.5 × 10. What mass of KNO₂ should the student dissolve in the HNO₂ solution to turn it into a buffer with pH =2.78? You may assume that the volume of the solution doesn't change when the KNO₂ is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.