Saturday
April 19, 2014

Homework Help: Chemistry

Posted by Anonymous on Thursday, April 26, 2012 at 9:59pm.

What mass of solid potassium nitrite would need to be dissolved in 500. mL of 0.40 M HNO2 to make 500. mL of a NO2−/HNO2 buffer solution that has a pH = 3.25? Ka of HNO2 = 7.1 x 10−4. (Assume no significant volume change during dissolution of the potassium nitrite)
(1) 3.3 g (2) 6.5 g (3) 11 g (4) 21 g (5) 42 g

I know the answer is 21 g, but I cannot seem to get this answer when I'm working out the problem.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - Solid sodium nitrate can be decomposed to solid sodium nitrite and ...
Chemistry - Chemical formula for Mercury(II)Chloride, Potassium nitrite, ...
chemistry - How many grams of potassium nitrate are required to produce 5.00 g ...
chemistry - 15.45 grams of solid potassium chlorate decomposes when heated to ...
chemistry help! - Potassium has an atomic mass of 39.10amu. a sample of ...
chemistry - what mass (in grams) of solid potassium permanaganate is required to...
chemistry - what mass (in grams) of solid potassium permanaganate is required to...
Chemistry - 1)20 mL of a saturated of potassium nitrae at 50oC. Approximately, ...
chemistry - What is the nitrogen-oxygen bond order in potassium nitrite
chemistry - a mixture containing only sodium chloride and potassium chloride has...

Search
Members