Homework Answers
![TH 3 pou] = 1.90M = 0 M3 Poy + H₂O HaPou (aq) + H₂ot; kq, = 7-5x703 Cox 2 initial final c-ca ka, - CA? -x ka, = (cm) (CX- ((-](http://img.homeworklib.com/questions/a861e660-5188-11ea-bffd-7310386645ca.png?x-oss-process=image/resize,w_560)
![+ H2PO4 + H2O — HP oy” ноt ka, = (-2 х 15° һие kg, <<< 1 so we can take assumption Сн, Роu ] = 0 116 11 Ка, = CHPou?] (но11,](http://img.homeworklib.com/questions/a8f2ec70-5188-11ea-98a2-33a678f0268e.png?x-oss-process=image/resize,w_560)
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Phosphoric acid is triprotic with the step-wise dissociation shown below. A 1.90 M phosphoric acid solution...
Phosphoric acid is triprotic with the step-wise dissociation shown below. A 1.75 M phosphoric acid solution...
Phosphoric acid is triprotic with the step-wise dissociation shown below. A 1.75 M phosphoric acid solution is prepared. Calculate the equilibrium concentrations of the species indicated. Report all answers in scientific notation using 2 sig figs. Rather than use the quadratic equation, you can make assumptions like we do in class (ie if K<<1, then 0.1-x ~ 0.1). Please fill in blanks below all species. Please answer each equilibrium concentration of each species in scientific notation. H3PO4H3PO4 + H2OH2O ↔↔...
Phosphoric acid is triprotic with the step-wise dissociation shown below. A 1.34 M phosphoric acid solution is prep...
Phosphoric acid is triprotic with the step-wise dissociation shown below. A 1.34 M phosphoric acid solution is prepared. Calculate the equilibrium concentrations of the species indicated. Report all answers in scientific notation using 2 sig figs. Rather than use the quadratic equation, you can make assumptions like we do in class (ie if K<<1, then 0.1-x -0.1) H3PO HO H.PO H3O Kai = 7.5c10-3 Preview Preview Preview H.PO H20 HPo? + H50+ K - 6.2:10 -* Preview Preview HPO H2O...
Phosphoric acid is a triprotic acid (Kal = 6.9 x 10-3, Ka2 = 6.2 x 10-8,...
Phosphoric acid is a triprotic acid (Kal = 6.9 x 10-3, Ka2 = 6.2 x 10-8, and Ka3 = 4.8 x 10-13). To find the pH of a buffer composed of H,PO, (aq) and HPO2 (aq), which pKa value should be used in the Henderson-Hasselbalch equation? O pK al = 2.16 OpKq2 = 7.21 O pK a3 = 12.32 Calculate the pH of a buffer solution obtained by dissolving 19.0 g of KH,PO4(s) and 30.0 g of Na, HPO4(s) in...
Phosphoric acid is a triprotic acid (Kal 6.9x10-3, Ka2 6.2x 10-8, and Ka3 4.8x 10-3). To...
Phosphoric acid is a triprotic acid (Kal 6.9x10-3, Ka2 6.2x 10-8, and Ka3 4.8x 10-3). To find the pH of a buffer composed of H2PO4 (aq) and HPO4 (aq), which pKa value would you use in the Henderson-Hasselbalch equation? O pkat 2.16 O pKa2 7.21 рказ 12.32 Calculate the pH of a buffer solution obtained by dissolving 15.0 g of KH2PO4(s) and 25.0 g of Na2HPO4(S) in water and then diluting to 1.00 L Number pHL
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
5. Calculate the pH at 25°C of a 0.85 M aqueous solution of phosphoric acid (H3PO4)....
5. Calculate the pH at 25°C of a 0.85 M aqueous solution of phosphoric acid (H3PO4). 5. (Ka1, Ka2, and Ka3 for phosphoric acid are 7.5 × 10−3, 6.25 × 10−8, and 4.8 × 10−13, respectively.)
A 0.771 M solution of a weak base (B:) is made. The solution has a pH...
A 0.771 M solution of a weak base (B:) is made. The solution has a pH of 11.35. Calculate the Kb of this base. Report your answer in scientific notation with 3 sig figs. Preview
A 0.100 M solution of an unknown acid, HA, is 1.47% ionized. Complete the following table,...
A 0.100 M solution of an unknown acid, HA, is 1.47% ionized. Complete the following table, but instead of using the variable x, calculate the number values of each quantity and report these values to the correct number of significant figures. Fill in all of the cells. Include signs in the Change column to indicate a gain or loss of concentration. Do not include any units in your answers, M is assumed. To enter values in scientific notation follow the...
*Remember to submit each part separately to avoid losing your work* A 0.100 M solution of...
*Remember to submit each part separately to avoid losing your work* A 0.100 M solution of an unknown acid, HA, is 3.87% ionized. Complete the following table, but instead of using the variable x, calculate the number values of each quantity and report these values to the correct number of significant figures. Fill in all of the cells. Include signs in the Change column to indicate a gain or loss of concentration. Do not include any units in your answers,...
2. Calculate y, and report the result with the correct number of significant figures and the absolute error: y-251(+-1) x 860(+-2) / 1.673(+-0.006) Its question #2 i typed it out you do not need...
2. Calculate y, and report the result with the correct number
of significant figures and the absolute error: y-251(+-1) x
860(+-2) / 1.673(+-0.006)
Its
question #2 i typed it out you do not need the picture
The question is to Calculate Y, and report the result with the
correct number of significant figures and the absolute error:
y=251(+-1) x 860(+-2) / 1.673(+-0.006)
3
sig figs
(10 points) Calculate the pH of a solution that is 0.04 M in NH, and...
Phosphoric acid is triprotic with the step-wise dissociation shown below. A 1.34 M phosphoric acid solution is prepared. Calculate the equilibrium concentrations of the species indicated. Report all answers in scientific notation using 2 sig figs. Rather than use the quadratic equation, you can make assumptions like we do in class (ie if K<<1, then 0.1-x -0.1) H3PO HO H.PO H3O Kai = 7.5c10-3 Preview Preview Preview H.PO H20 HPo? + H50+ K - 6.2:10 -* Preview Preview HPO H2O...
Phosphoric acid is a triprotic acid (Kal = 6.9 x 10-3, Ka2 = 6.2 x 10-8, and Ka3 = 4.8 x 10-13). To find the pH of a buffer composed of H,PO, (aq) and HPO2 (aq), which pKa value should be used in the Henderson-Hasselbalch equation? O pK al = 2.16 OpKq2 = 7.21 O pK a3 = 12.32 Calculate the pH of a buffer solution obtained by dissolving 19.0 g of KH,PO4(s) and 30.0 g of Na, HPO4(s) in...
Phosphoric acid is a triprotic acid (Kal 6.9x10-3, Ka2 6.2x 10-8, and Ka3 4.8x 10-3). To find the pH of a buffer composed of H2PO4 (aq) and HPO4 (aq), which pKa value would you use in the Henderson-Hasselbalch equation? O pkat 2.16 O pKa2 7.21 рказ 12.32 Calculate the pH of a buffer solution obtained by dissolving 15.0 g of KH2PO4(s) and 25.0 g of Na2HPO4(S) in water and then diluting to 1.00 L Number pHL
A 0.771 M solution of a weak base (B:) is made. The solution has a pH of 11.35. Calculate the Kb of this base. Report your answer in scientific notation with 3 sig figs. Preview
A 0.100 M solution of an unknown acid, HA, is 1.47% ionized. Complete the following table, but instead of using the variable x, calculate the number values of each quantity and report these values to the correct number of significant figures. Fill in all of the cells. Include signs in the Change column to indicate a gain or loss of concentration. Do not include any units in your answers, M is assumed. To enter values in scientific notation follow the...
2. Calculate y, and report the result with the correct number
of significant figures and the absolute error: y-251(+-1) x
860(+-2) / 1.673(+-0.006)
Its
question #2 i typed it out you do not need the picture
The question is to Calculate Y, and report the result with the
correct number of significant figures and the absolute error:
y=251(+-1) x 860(+-2) / 1.673(+-0.006)
3
sig figs
(10 points) Calculate the pH of a solution that is 0.04 M in NH, and...
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