A chemistry graduate student is given 100. mL of a 0.40M nitrous acid (HNO,) solution. Nitrous acid is a weak acid with K=4.5 x 10 What mass of NaNO, should the student dissolve in the HNO, solution to turn it into a buffer with pH = 3.16? You may assume that the volume of the solution doesn't change when the NaNO, is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.
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![A chemistry graduate student is given 100. mL of a 0.40M nitrous acid (HNO,) solution. Nitrous acid is a weak acid with K 4.5 x 10. What mass of
-4
NaNO, should the student dissolve in the HNO, solution to turn it into a buffer with pH =3.16?
%3D
You may assume that the volume of the solution doesn't change when the NaNO, is dissolved in it. Be sure your answer has a unit symbol, and round it to 2
significant digits.
x10
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