For phosphoric acid, pKa1 = 2.16, pKa2 = 7.21, and pKa3 = 12.32; which of the...
For phosphoric acid, pKa1 = 2.16, pKa2 = 7.21, and pKa3 = 12.32; which of the following pairs of solutions could be used to produce a solution buffered at pH = 12.00?
a) 1.00 M H3PO4 & 1.00 M HCl
b) 1.00 M NaH2PO4 & 1.00 M Na2HPO4
c) 1.00 M Na3PO4 & 1.00 M HCl
d) 1.00 M Na3PO4 & 1.00 M NaOH
Please explain.
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For phosphoric acid, pKa1 = 2.16, pKa2 = 7.21, and pKa3 = 12.32;
which of the...
pKalpKa2 2.16 7.21 pKa3 12.32 Phosphoric acid, H2PO4 (aq), is a triprotic acid, meaning that one molecule of the acid h...
pKalpKa2 2.16 7.21 pKa3 12.32 Phosphoric acid, H2PO4 (aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH and the concentrations of all species in a 0.400 M phosphoric acid solution. [H2PO4) = (H+) =( M M 7m [H, PO1 = [OH-] = M [HPO4) = MpH = [PO] = M
Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three...
Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.500 M phosphoric acid solution. pKa1= 2.16 pKa2 = 7.21 pKa3 = 12.32 What's: H3PO4, H2PO4-, HPO4-2, PO4-3, H+ ,OH- , pH
Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three...
Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH and the concentrations of all species in a 0.300 M phosphoric acid solution. pKa1 pKa2 pKa3 2.16 7.21 12.32 [H3PO4]= M [H^+]= M [H2PO4 ^−]= M [OH^−]= M [HPO4 ^2−]= M pH= [PO4 ^3−]= M
Phosphoric acid is a triprotic acid with the following pKa values: pKa1=2.148 pKa2=7.198 pKa3=12.375 You wish...
Phosphoric acid is a triprotic acid with the following pKa values: pKa1=2.148 pKa2=7.198 pKa3=12.375 You wish to prepare 1.000 L of a 0.0100 M phosphate buffer at pH 7.580. To do this, you choose to mix the two salt forms involved in the second ionization, NaH2PO4 and Na2HPO4, in a 1.000 L volumetric flask and add water to the mark. What mass of each salt will you add to the mixture? Mass NaH2PO4=? Mass Na2HPO4=?
What concentration of HCl will have a pH of 5.0? b) What concentration of acetic acid will have a pH of 5.0? (For acetic...
What concentration of HCl will have a pH of 5.0? b) What concentration of acetic acid will have a pH of 5.0? (For acetic acid, pKa=4.76) c) What concentration of phosphoric acid will have a pH of 5.0? (For H3PO4, pKa1 = 2.12, pKa2 = 7.21, pKa3 =12.32) d) What is the pH of a 10 mM solution of phosphoric acid? e) How much 1.0 M NaOH must be added to 100 ml of 10 mM H3PO4 to raise the...
the pka's of phosphoric acid are: pKa1 = 2.2; pKa2 = 7.2; pKa3 = 12.7. What...
the pka's of phosphoric acid are: pKa1 = 2.2; pKa2 = 7.2; pKa3 = 12.7. What is the ratio of the concentrations of the appropriate salt to the acid for this buffer solution?
If 10 µmol acetic acid is generated in a 1-ml enzyme-catalyzed reaction buffered by 60 mM...
If 10 µmol acetic acid is generated in a 1-ml enzyme-catalyzed reaction buffered by 60 mM Naphosphate (pH 7.21), what is the final pH of the solution? For phosphoric acid, pKa1 = 2.12, pKa2 = 7.21, pKa3 = 12.32; for acetic acid, pKa = 4.76.
Phosphoric acid is a triproccd (K 6.9x10-3, 6.2x10-8, and Ka3 4.8x 10-13). To find the pH of a buffer composed of H2PO4...
Phosphoric acid is a triproccd (K 6.9x10-3, 6.2x10-8, and Ka3 4.8x 10-13). To find the pH of a buffer composed of H2PO4 (aq) and HPO (aq), which pKa value would you use in the Henderson-Hasselbalch equation? O pK 1 = 2.16 O p 2=7.21 O pKa3 12.32 Calculate the pH of a buffer solution obtained by dissolving 11.0 g of KH2PO4(s) and 26.0 g of Na2HPO4(s) in water and then diluting to 1.00 L Number pH= |
Phosphoric acid is...
Phosphoric acid, H3PO4, is a triprotic acid with the following acid dissociation constants: Ka1 = 7.5 × 10-3 Ka2 = 6.2...
Phosphoric acid, H3PO4, is a triprotic acid with the following acid dissociation constants: Ka1 = 7.5 × 10-3 Ka2 = 6.2 × 10-8 Ka3 = 4.2 × 10-13 Which of the following combinations would be best for preparing a pH 7 buffer? a. H3PO4 and NaH2PO4 b. H3PO4 and HCl c. Na2HPO4 and Na3PO4 d. NaH2PO4 and Na2HPO4 e. H3PO4 and Na3PO4
Throughout the table shown below, explain how you'll prepare a liter of phosphate buffer at a...
Throughout the table shown below, explain how you'll prepare a liter of phosphate buffer at a pH of 7.402 Phosphoric acid (H3PO4) Monosodium phosphate (NaH2PO4) Disodium phosphate (Na2HPO4) pKai = 2.16 pKaz = 7.21 pKaz = 12.32
pKalpKa2 2.16 7.21 pKa3 12.32 Phosphoric acid, H2PO4 (aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH and the concentrations of all species in a 0.400 M phosphoric acid solution. [H2PO4) = (H+) =( M M 7m [H, PO1 = [OH-] = M [HPO4) = MpH = [PO] = M
Phosphoric acid is a triproccd (K 6.9x10-3, 6.2x10-8, and Ka3 4.8x 10-13). To find the pH of a buffer composed of H2PO4 (aq) and HPO (aq), which pKa value would you use in the Henderson-Hasselbalch equation? O pK 1 = 2.16 O p 2=7.21 O pKa3 12.32 Calculate the pH of a buffer solution obtained by dissolving 11.0 g of KH2PO4(s) and 26.0 g of Na2HPO4(s) in water and then diluting to 1.00 L Number pH= |
Phosphoric acid is...
Throughout the table shown below, explain how you'll prepare a liter of phosphate buffer at a pH of 7.402 Phosphoric acid (H3PO4) Monosodium phosphate (NaH2PO4) Disodium phosphate (Na2HPO4) pKai = 2.16 pKaz = 7.21 pKaz = 12.32
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