Question 13 7 pts Phosphoric acid, H3PO4, is a triprotic acid. What is the total number...
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 is a triprotic acid in water, ionizing in the following sequential steps: H3PO4+H204H2PO4 +H30+ K. = 7.11 x 10-3 H2PO4 + H20 5 HPO42- +H30+ K. -6.32 x 10-8 HPO42- + H20 PO43- +H30+ K. - 4.5 x 10-13 What is the pH of a 0.20 MH3PO4 solution? 04.09 5.37 2.15 2.84 1.46
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
Phosphoric acid, H3PO4,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→P4O10P4+5O2→P4O10 Reaction 2: P4O10+6H2O→4H3PO4P4O10+6H2O→4H3PO4 What is the molar mass of phosphoric acid, H3PO4?H3PO4? Report your answer to 3 significant figures. g/mol How many moles of H3PO4H3PO4 can be produced from one mole of P4P4 ? Hint: You need to look at both reaction (1) and reaction (2). Your answer should...
Question 15 0/4 pts The acid ionization constants of phosphoric acid (H3PO4) are Ka1 = 7.5 x 10-3. Ka2 = 6.2 x 10-8 and Ka3 - 4.2 x 10-13 at 25.0°C. What is the molar concentration of phosphate ion in a 2.5 M aqueous solution of phosphoric acid?
17 H3PO4H20S H2PO4 + H30 Phosphoric acid is a triprotic acid in water, ionizing in the following sequential steps: K 7.11 x 103 K6.32 x 108 к, 3 4.5 х 10 13 = H2PO4H20S HPO42- + H30* НРО,- + H20 S PO3-+ H;0* What is the pH ofa 0.20 M H3PO4 solution? A. 2.84 В. 1.46 С. 2.15 D. 4.09 E. 5.37
n 14 1. An aqueous solution of phosphoric acid, H3PO4 contains 285 H3PO4 in 400 ml. solution, and has a duty of 135 g ml. Molama H3PO4 - 97.9951 g/mol). This has two portion questions Show the work clearly. a. Calculate the weight H3PO4 in this solution (4 pts) what is the concentration in mol L of this solution (pt)
H3PO4 is a triprotic weak acid. What is the balanced equilibrium defined as Ka2 of H3PO4? O H2PO4 (aq) + H2O(l) =H2O*(aq) +HPO42- (aq) HPO42- (aq) + H2O(1) = OH(aq) + H2PO4 (aq) O HPO42-(aq) + H2O(1) =H20*(aq) + PO43-(aq) O H2PO4 (aq) + H2O(l) = OH" (aq) + H3PO4(aq) O H3PO.(aq) + H2O(1) =H30*(aq) + H2PO4 (aq)
Our chemist found a solution of 0.333M H3PO4 (phosphoric acid) and another of 1.05M NaOH (amazing what you can find in the belly of a ship) and so she did an enthalpy of neutralization reaction using 50.0mL of each solution. (Phosphoric acid is a triprotic acid; each mole of acid can yield 3 moles of H+ ions.) Using the CRC Handbook at hand, the density and specific heats of the final solution were found to be 1.11 g/mL and 3.81...
Phosphoric acid can be prepared from calcium phosphate according to the following reaction: Ca3(PO4)2 (s) + 3 H2SO4 (l) → 3 CaSO4 (s) + 2 H3PO4 (l) 310. g/mol 98.0 g/mol 136 g/mol 98.0 g/mol [a] If 0.664 mole of Ca3(PO4)2 are combined with 1.53 mole of H2SO4, how many grams of H3PO4 can be produced? [4 pts] [b] If 62.6 g of H3PO4 is actually produced in the above reaction, what is the percent yield for the reaction? [2...