Question

How many grams of NaNO2 must be added to 1 liter of 1.00 M HNO2 solution in order to prepare a buffer solution with pH = 4.14? pH = 3.14?

My work:

ka = pH(buffer ratio)

4.5 * 10^-4 = 1.000*10^-4.14 (x M of base/1.00 M of acid)

x = 6.21

6.21 M = (6.21 moles/1 L)(1 L) = 6.21 moles

#grams NaNO2 = 6.21 moles (68.9953 g/ 1 mole) = 428 grams??

Feb 22, 2016

Related Questions

Buffers- Common Ion effect IS this Correct Calculate the pH of a aqueous solution containing 0... What volumes of 0.46 M HNO2 and 0.54 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered... How many grams of NaNO2 should be dissolved in 500cm3 solution of nitrous acid (HNO2) with concentra... One liter of a buffer composed of 1.2 M HNO2 and 0.8 M NaNO2 is mixed with 400 mL of 0.5 M NaOH. Wha...