# chem

posted by .

What volumes of 0.53 M HNO2 and 0.46 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.55?
HNO2

• chem -

Use the Henderson-Hasselbalch equation.
pH = pKa + log (base/acid)

You must look up Ka and substitute pKa.

• chem -

228mL
452mL

## Similar Questions

1. ### Chemistry

Buffers- Common Ion effect IS this Correct Calculate the pH of a aqueous solution containing 0.15 M HNO2 and 0.20 M NaNO2 (aq). The Ka of nitrous acid is 4.0*10^-4. HNO2 + H20 <--> NaNO2- + H30^+ Inital 0.15 0.20 X Final 0.15 …
2. ### A.P. Chemistry

You have solutions of 0.200 M HNO2 and 0.200 M KNO2 (Ka for HNO2 = 4.00  10-4). A buffer of pH 3.000 is needed. What volumes of HNO2 and KNO2 are required to make 1 liter of buffered solution?
3. ### A.P. Chemistry

You have solutions of 0.200 M HNO2 and 0.200 M KNO2 (Ka for HNO2 = 4.00  10-4). A buffer of pH 3.000 is needed. What volumes of HNO2 and KNO2 are required to make 1 liter of buffered solution?
4. ### Chemistry

What volumes of 0.46 M HNO2 and 0.54 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.40?
5. ### chemistry

Calculate the pH at the point in the titration of 25.00 mL 0.108 M HNO2 at which 10.00 mL 0.162 M NaOH have been added. For HNO2, Ka=5.1 x 10^-4 and: HNO2 + OH- -----> H2O + NO2- I know that HNO2 is a weak acid and that 5.1 x 10^-4=[NO2-]/[HNO2][OH-]. …
6. ### chemistry

Calculate the pH at the point in the titration of 25.00 mL 0.108 M HNO2 at which 10.00 mL 0.162 M NaOH have been added. For HNO2, Ka=5.1 x 10^-4 and: HNO2 + OH- -----> H2O + NO2- I know that HNO2 is a weak acid and NaOH is a strong …
7. ### Science

you are to make a buffer of pH = 4.33 using HNO2 and NaNO2 what ratio of NO2- to HNO2 is required?
8. ### CHEMISTRY

How many grams of NaNO2 should be dissolved in 500cm3 solution of nitrous acid (HNO2) with concentration of 0.03mol/dm3 if we wish the solution to show a pH of 3.2 Ka = 4.5 * 10^-4 M(NaNO2) = 69 g/mol
9. ### Chemistry

Suppose you are assigned to prepare a buffer of 0.10M HNO2 (Ka=1.7 x 10^-4) and 0.10M NaNO2 by mixing equal volumes of both solutions. What is the pH of the resultant solution?
10. ### Chemistry

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?

More Similar Questions