Phosphoric acid is a triprotic acid, and the Ka values are given below. Calculate pH, pOH,...

Phosphoric acid is a triprotic acid, and the Ka values are given below. Calculate pH, pOH, [H3PO4], [H2PO4 2- ], [HPO4 - ], and [PO4 3- ] at equilibrium for a 5.00 M phosphoric acid solution.

Ka1 = 7.5 x 10-3

Ka2 = 6.2 x 10-8

Ka3 = 4.2 x 10

Solutions

Expert Solution

here

For every dissociation concentration is decreasing that is why, we assume that

x , , z are smaller than above concentration and hence assumed to be negligible.. Compare to the given one.

Ph = 0.72

POH= 13.28

H3PO4 = 4.807

Hope it clears !

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

Phosphoric acid, H3PO4(aq), is a triprotic acid. Calculate the pH and concentrations of H3O + (aq),...

Phosphoric acid, H3PO4(aq), is a triprotic acid. Calculate the pH and concentrations of H3O + (aq), H3PO4(aq), H2PO4 − (aq), HPO4 2− (aq), PO4 3− (aq), and OH− (aq) in a 0.100-M phosphoric acid solution at 25°C.

39. Phosphoric acid (H3PO4) is a triprotic weak acid. Calculate the pH, [H3PO4], [H2PO4 -], [HPO4...

39. Phosphoric acid (H3PO4) is a triprotic weak acid. Calculate the pH, [H3PO4], [H2PO4 -], [HPO4 2-], and [PO4 3-] of a 4.5 M H3PO4 aqueous solution. H3PO4 (aq) + H2O (l) ⇌ H3PO4 - (aq) + H3O+ (aq) Ka1 = 7.5 × 10-3 H3PO4 - (aq) + H2O (l) ⇌ HPO4 2- (aq) + H3O+ (aq) Ka2 = 6.2 × 10-8 HPO4 2- (aq) + H2O (l) ⇌ PO4 3- (aq) + H3O+ (aq) Ka3 = 4.2 × 10-13

Calculate the pH and pOH of a 0.50 M solution of Acetic Acid. The Ka of...

Calculate the pH and pOH of a 0.50 M solution of Acetic Acid. The Ka of HOAc is 1.8 x10-5 [H3O+]/(0.50-0.00095)=1.8x10-5 where did they get the .00095, its said to take that as the second assumption [H3O+]=9.4x10-4 [H3O+]/(0.50-0.00094)=1.85x10-5 [H3O+]=9.4x10-4 (this is said to be the third assumption) Please, please help I really dont understand this, please show all steps and be as descriptive as possible.

What is the pH of 0.41 M H3PO4? The Ka values for phosphoric acid are Ka1...

What is the pH of 0.41 M H3PO4? The Ka values for phosphoric acid are Ka1 = 7.5×10-3, Ka2 = 6.2×10-8, and Ka3 = 3.6×10-13.

2. Phosphoric acid (H3PO4) is a triprotic acid with the following pKa values: pKa1 = 2.15...

2. Phosphoric acid (H3PO4) is a triprotic acid with the following pKa values: pKa1 = 2.15 pKa2 = 7.20 pKa3 = 12.35 a). You wish to prepare a 1.000 L of a 0.0450 M phosphate buffer at pH 6.8. Which of the following salts do you use (PICK 2) and what mass of each salt will you add to the mixture? H3PO4 (M.W.= 97.995) KH2PO4 (M.W.=136.086) Na2HPO4 (M.W.=141.959) AlPO4 (M.W.=121.953) 2 b). A concentrated phosphate buffer known as “phosphate buffered...

Phosphoric acid is a triprotic acid. Calculate the [PO4^3-] if you start out with 5.00 M...

Phosphoric acid is a triprotic acid. Calculate the [PO4^3-] if you start out with 5.00 M phosphoric acid.

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 0.0200 M phosphate buffer at pH 7.720. 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= ________g mass Na2HPO4= __________g What other combination...

Phosphoric acid, H 3 PO 4 ( aq ) , is a triprotic acid, meaning that...

Phosphoric acid, H 3 PO 4 ( 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. [ H 3 PO 4 ] = [ H + ] = [ H 2 PO − 4 ] = [ OH − ] = [ HPO 2 − 4 ] = [ PO 3 − 4 ] =

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(M) of all species in a 0.300 M phosphoric acid solution. pKa1= 2.16 pKa2=7.21 pKa3=12.32 [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 0.500 M phosphoric acid solution. pKa1= 2.16 pKa2=7.21 pKa3= 12.32 What's: H3PO4, H2PO4-, HPO4-2, PO4-3, H, OH, and pH -Thanks!

Subjects