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![Reaction : H₂POü = Hou² + H+ Ka = 6:31 x 10 Ka = [HPO42-]CH+] [H₂PO4 Now, 34.4 g moles of Na H₂Pou 119.98 g/mol 0.2867 mol Mo](http://img.homeworklib.com/questions/6621ef30-da00-11ea-83ff-37c54ab91461.png?x-oss-process=image/resize,w_560)
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What is the pH of the buffer resulting of the mixing of 34.4 g of
sodium...
4 points 3. What is the pH of the buffer resulting of the mixing of 34,4...
4 points 3. What is the pH of the buffer resulting of the mixing of 34,4 g of sodium dihydrogen phosphate (NaH2PO4) and 48.5 g of sodium hydrogen phosphate (Na2HPO4) in 2.5 L of distilled water? Your answer
Maps 1. What is the pH of a 0.35 mol/L solution of acetylsalicylic acid (C9H804)? 2...
Maps 1. What is the pH of a 0.35 mol/L solution of acetylsalicylic acid (C9H804)? 2 points Your answer 2. What is the pH of a 1.50 mol/L solution of ammonium chloride (NH4Cl)? 2 points Your answer 4 points 3. What is the pH of the buffer resulting of the mixing of 34.4 g of sodium dihydrogen phosphate (NaH2PO4) and 48.5 g of sodium hydrogen phosphate (Na2HPO4) in 2.5 L of distilled water? Your answer 4. What is the pH...
A student was told to make a pH = 7.5 buffer from sodium dihydrogen phosphate and...
A student was told to make a pH = 7.5 buffer from sodium dihydrogen phosphate and sodium hydrogen phosphate with an ionic strength of 0.10 a) What concentration of Na2HPO4 and NaH2PO4 need to be used? b) If 10.0 mL of 1.00 M Hbr is added to 1.00 L of this buffer, what is the pH? Please show work.
2 points 9. Using your textbook and class notes as a reference, indicate if cresol red...
2 points 9. Using your textbook and class notes as a reference, indicate if cresol red would be a good acid-base indicator for this titration. Justify your answer using your knowledge of titrations curves and indicators. if we use cresol red which has a ph range of 8-10.5 it can good indicator because our titration is Naoh and ASA i.e strong base and weak acid so equivalence point is around ph=9. Cresol red can indicate this equivalence point by changing...
A buffer is prepared by mixing 50.0mL of 1.0M sodium hydrogen phosphate with 40.0mL of 1.20...
A buffer is prepared by mixing 50.0mL of 1.0M sodium hydrogen phosphate with 40.0mL of 1.20 M sodium dihydrogen phosphate. (For phosphoric acid, Ka1 = 7.5x10-3, Ka2 = 6.2x10-8, Ka3 = 2.2x10-13) What is the pH of this buffer?
22. To simulate the pH of blood, which is 7.4, a buffer solution made by dissolving...
22. To simulate the pH of blood, which is 7.4, a buffer solution made by dissolving sodium dihydrogen phosphate (Kg = 6.2 x 10-4) and sodium hydrogen phosphate (Kx = 3.6 x 10-13) together in an aqueous solution can be used. What mole ratio of Na2HPO4/NaH2PO4 is required to produce a solution with a pH of 7.4? A. B. C. D. E. 1.2 1.6 0.90 1.0 0.96
A of the buffer resulting of 3. What is the pihydrogend Ophosphetto (Nahpoy) mixing of.34.4g of...
A of the buffer resulting of 3. What is the pihydrogend Ophosphetto (Nahpoy) mixing of.34.4g of sodium d land I Ju8.5 g of sodium hydrogen bhosphate ( na Wcb bin 35 L ou water
Calculate the pH of a dihydrogen phosphate/hydrogen phosphate buffer prepared with the following concentration. (Ka for...
Calculate the pH of a dihydrogen phosphate/hydrogen phosphate buffer prepared with the following concentration. (Ka for H2PO4− is 6.2 × 10−8). Report your answer to three significant figures. 2.0 M NaH2PO4 and 2.0 M Na2HPO4:
What is the pH of the buffer that results when 14.0 g of NaH2PO4 and 7.84...
What is the pH of the buffer that results when 14.0 g of NaH2PO4 and 7.84 g of Na2HPO4 are diluted with water to a volume of 0.940 L? (K, of H2PO4 = 6.2E-8, the molar masses of NaH2PO4 and Na2HPO4 are 120.0 g/mol and 142.0 g/mol, respectively) 0 7.21 0 7.53 0 -6.88 O 6.96 O 6.88
Need help with question 4. Answered - Correct! 2 attempts left. Change your responses to resubmit...
Need help with question 4.
Answered - Correct! 2 attempts left. Change your responses to resubmit Question 4: Buffers Homework. Unanswered A buffer was made by mixing 10mL of 0.40M sodium dihydrogen phosphate (NaH2PO4) with 10mL of 0.40 M sodium hydrogen phosphate (Na2HPO4). What is the pH after 20.0mL of 0.010M NaOH is added to the buffer? The 3 Ka values for phosphotic acid are: Kal = 7.5x10–3, Ka2 = 6.2x10-8,6 a3 = 4.8x10-13 Numeric Answer: 9.4 You are incorrect...
4 points 3. What is the pH of the buffer resulting of the mixing of 34,4 g of sodium dihydrogen phosphate (NaH2PO4) and 48.5 g of sodium hydrogen phosphate (Na2HPO4) in 2.5 L of distilled water? Your answer
Maps 1. What is the pH of a 0.35 mol/L solution of acetylsalicylic acid (C9H804)? 2 points Your answer 2. What is the pH of a 1.50 mol/L solution of ammonium chloride (NH4Cl)? 2 points Your answer 4 points 3. What is the pH of the buffer resulting of the mixing of 34.4 g of sodium dihydrogen phosphate (NaH2PO4) and 48.5 g of sodium hydrogen phosphate (Na2HPO4) in 2.5 L of distilled water? Your answer 4. What is the pH...
2 points 9. Using your textbook and class notes as a reference, indicate if cresol red would be a good acid-base indicator for this titration. Justify your answer using your knowledge of titrations curves and indicators. if we use cresol red which has a ph range of 8-10.5 it can good indicator because our titration is Naoh and ASA i.e strong base and weak acid so equivalence point is around ph=9. Cresol red can indicate this equivalence point by changing...
22. To simulate the pH of blood, which is 7.4, a buffer solution made by dissolving sodium dihydrogen phosphate (Kg = 6.2 x 10-4) and sodium hydrogen phosphate (Kx = 3.6 x 10-13) together in an aqueous solution can be used. What mole ratio of Na2HPO4/NaH2PO4 is required to produce a solution with a pH of 7.4? A. B. C. D. E. 1.2 1.6 0.90 1.0 0.96
A of the buffer resulting of 3. What is the pihydrogend Ophosphetto (Nahpoy) mixing of.34.4g of sodium d land I Ju8.5 g of sodium hydrogen bhosphate ( na Wcb bin 35 L ou water
What is the pH of the buffer that results when 14.0 g of NaH2PO4 and 7.84 g of Na2HPO4 are diluted with water to a volume of 0.940 L? (K, of H2PO4 = 6.2E-8, the molar masses of NaH2PO4 and Na2HPO4 are 120.0 g/mol and 142.0 g/mol, respectively) 0 7.21 0 7.53 0 -6.88 O 6.96 O 6.88
Need help with question 4.
Answered - Correct! 2 attempts left. Change your responses to resubmit Question 4: Buffers Homework. Unanswered A buffer was made by mixing 10mL of 0.40M sodium dihydrogen phosphate (NaH2PO4) with 10mL of 0.40 M sodium hydrogen phosphate (Na2HPO4). What is the pH after 20.0mL of 0.010M NaOH is added to the buffer? The 3 Ka values for phosphotic acid are: Kal = 7.5x10–3, Ka2 = 6.2x10-8,6 a3 = 4.8x10-13 Numeric Answer: 9.4 You are incorrect...
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