Phosphoric acid, H3PO4, has some important applications. It can be used to produce fertilizers and it...

Phosphoric acid, H₃PO₄, has some important applications. It can be used to produce fertilizers and it is present in soft drinks. Phosphoric acid can be made from phosphorus in a two step process:

Reaction 1: P₄+ 5O₂ → P₂O₁₀

Reaction 2: P₄H₁₀ + 6H₂O → 4H₃PO₄

1. What is the molar mass of phosphoric acid, H₃ PO₄? Report your answer to 3 significant figures.

2. How many moles of H₃PO₄ can be produced from one mole of P₄?

3. A synthesis yielded 152 g of H₃PO₄. How many moles H₃PO₄ of were produced?

4. How many moles of P 4 P4 would be required to produce the number of moles of H 3 P O 4 H3PO4 determined in question 3?

5. Convert the moles of P₄ determined in question 4 into grams. This will tell us the grams of P₄ that actually reacted.

6. Let's say that the experimentalist actually used 175 g from a bottle labeled P₄. Based on your answer to question 5, you can see that it did not all react. We will assume that this was because the reagent in this bottle contained inert impurities. Based upon your answer to question 5 and the mass of the reagent taken from the bottle labeled P₄, what was the actual mass percent of P₄ in the bottle?

Expert Solution

queen_honey_blossom answered 2 years ago

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!

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

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, 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.

What is the concentration of PO43- in a 4.79 M solution of phosphoric acid (H3PO4) at...

What is the concentration of PO43- in a 4.79 M solution of phosphoric acid (H3PO4) at equilibrium? ka1=7.5e-3 ka2=6.2e-8 ka3=4.8e-13 please show work *It's not 5.93e-4 or 3.44e-19

a solution if phosphoric acid was made by dissolving 10g of H3PO4 in 100mL of water....

a solution if phosphoric acid was made by dissolving 10g of H3PO4 in 100mL of water. the resulting volume was 104mL. calculate the density, mole fraction, molarity, and molality of the solution. assume water has a density of 1g/cm3

Phosphoric acid has three titratable hydrogen ions; the respective equilibria are expressed as follows: H3PO4 -->...

Phosphoric acid has three titratable hydrogen ions; the respective equilibria are expressed as follows: H3PO4 --> /<-- H+ + H2PO41- pK1 = 2.1 H2PO41- -->/<-- H+ + HPO42- pK2 = 6.8 HPO42- -->/<-- H+ + PO43- pK3 = 12.4 How would you prepare 1L of a 1 M phosphate buffer, pH 7.5? Your available chemicals include solid NaH2PO4, solid Na2HPO4, solid NaOH, and 6 M HCl solution. Indicate how you would prepare this buffer.

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.

Phosphoric acid, H3PO4, is tribasic with pKa values of 2.14, 6.86, and 12.4. The ionic form...

Phosphoric acid, H3PO4, is tribasic with pKa values of 2.14, 6.86, and 12.4. The ionic form that predominates at pH 9.0is: H3PO4+ H2O ⇌H3O++ H2PO4-⇌H3O++ HPO42-⇌H3O++ PO43- the answer is HPO42– THANKS!

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