A chemistry graduate student is given 450. mL of a 1.30M nitrous acid (HNO₂) solution. Nitrous acid is a weak acid with K₁=4.5 x 10. What mass of KNO₂ should the student dissolve in the HNO₂ solution to turn it into a buffer with pH = 3.69? 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. S 5 E 0

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.