Be sure to answer all parts. A buffer consists of 0.17 M KHCO3 and 0.65 M K2CO3. Carbonic acid is a diprotic acid with Ka1 = 4.5 × 107 and Ka2 = 4.7 × 10-11. (a) Which Ka value is more important to this buffer? О Kal is more important. Ka2 is more important. (b) What is the buffer pH?

What ratio of NaCN to HCN is needed to prepare a pH 9.6O buffer? (Ka of HCN is 4.9 × 10-10)

buffer consists of 0.30 M ethylamine (C2H5NH2) and 0.40 M C2H5NH3Cl. What is the pH after 5.04 gof HNO3 is added to 2.00 L of the buffer? Kb(C2H5NH2)=5.6×10−4

(Oxalic, Sulfurous, Citric, Hydrofluoric, Formic, Benzoic, Acetic, Hypochlorous, Hydrocyanic, Phenol, Nitrous) Of the acids listed above, which is most suitable to make a buffer with pH = 7.0?  What should be added to this acid to create a buffer (give a chemical formula).

what volume of Boric acid 0.1 M and what volume of sodium hydroxide 0.1 M should be added together to produce a solution (buffer) with a pH of 9.1? (ka=6.0*10-10) 4H3BO3 +2NaOH --> Na2B4O7 +7H2O

A buffer is prepared from 60.0 mL of 0.100 M formic acid(HCOOH) and 40.0 mL of 0.100 M formate (HCOO --). What is thepH of the buffer solution ? K a of formic acid is 1.78 x 10 4

Calculate the pH of a buffer that is 0.208 M lactic acid, HC3H5O3, and 0.208 M sodium lactate, NaC3H5O3 if 9.474 mL of 4.192 M NaOH is added. The total volume is 1.00 L. The Ka for lactic acid is 1.4*10-4.

What quantity in moles of CH₃NH₃Cl  need to be added to 200.0 mL of a 0.500 M solution of CH₃NH₂ (Kb for CH₃NH₂ is 4.4 × 10⁻⁴) to make a buffer with a pH of 11.00?

A buffer solution is 0.462 M in HCN and 0.283 M in KCN. If Ką for HCN is 4.0 × 10-¹0, what is the pH of this buffer solution? pH =

A buffer solution contains 0.53 mol of hydrosulfuric acid (H2S) and 0.10 mol of sodium hydrogen sulfide (NaHS) in 8.70 L.The Ka of hydrosulfuric acid (H2S) is Ka = 9.5e-08.(a) What is the pH of this buffer?pH = ____(b) What is the pH of the buffer after the addition of 0.44 mol of NaOH? (assume no volume change)pH = ____(c) What is the pH of the original buffer after the addition of 0.02 mol of HI? (assume no volume change)pH = ____