Question

In: Chemistry

10) You want to create a buffer using phosphoric acid and Sodium Dihydrogen Phosphate. what is...

10) You want to create a buffer using phosphoric acid and Sodium Dihydrogen Phosphate. what is the best pH at which to make the buffer? using that pH and a concentration of 1M. Determine the molar concentrations of each component (acid and base) needed to make the buffer. If you need 100mL of the buffer, how many mL of 2.5 M phosphoric acid will you need? How many grams of the Sodium Dihydrogen Phosphate do you need?

11) using the buffer you created in problem 10 calculate the change in pH if you add 1 mL of 0.50M HCl to the buffer.

12) using the buffer you created in problem 10. calculate the change in pH if you add 2 mL of 0.50 NaOH to the buffer.

Solutions

Expert Solution

The answer is attach below

queen_honey_blossom answered 1 year ago
Next > < Previous

Related Solutions

An acidic buffer solution can be prepared from phosphoric acid and dihydrogen phosphate. a. What is...
An acidic buffer solution can be prepared from phosphoric acid and dihydrogen phosphate. a. What is the pH of solution prepared by mixing 23.5g of NaH 2 PO 4 and 15.0mL of concentrated phosphoric acid (14.7M) in enough water to give 1.25L of solution? b. By how much does the pH of this buffer solution change on the addition of 3.50 mL of 6.0M HCl?
A student dilutes 50 mL of a phosphoric acid-dihydrogen phosphate buffer solution to a final volume...
A student dilutes 50 mL of a phosphoric acid-dihydrogen phosphate buffer solution to a final volume of 100 ml. Will the pH of the buffer change noticeably? (Use Henderson -Hasselbeck conceptually ) For the same dilution above will the buffer capacity change ? Calculations: A 50.0 mL sample of a 0.100 M phosphoric acid, H3PO4 is titrated with 0.100 M NaOH. Identify the major chemical species present and calculate the pH at these four points (first consider the titration curve)...
A biochemist prepares two stocks of sodium phosphate buffer by titrating phosphoric acid with sodium hydroxide....
A biochemist prepares two stocks of sodium phosphate buffer by titrating phosphoric acid with sodium hydroxide. She prepares a 0.10 M solution of sodium phosphate buffer at pH 2.15, and she prepares a 0.10 M solution of sodium phosphate buffer at pH 7.20. If she mixes 50. mL of the pH 2.15 buffer with 30. mL of the pH 7.20 buffer, what will be the pH of the resulting solution? Recall that the pKas of phosphoric acid are 2.15, 7.20,...
A biochemist prepares two stocks of sodium phosphate buffer by titrating phosphoric acid with sodium hydroxide....
A biochemist prepares two stocks of sodium phosphate buffer by titrating phosphoric acid with sodium hydroxide. She prepares a 0.10 M solution of sodium phosphate buffer at pH 2.15, and she prepares a 0.10 M solution of sodium phosphate buffer at pH 7.20. If she mixes 50. mL of the pH 2.15 buffer with 30. mL of the pH 7.20 buffer, what will be the pH of the resulting solution? Recall that the pKas of phosphoric acid are 2.15, 7.20,...
Calculate the pH of a 0.1620 M aqueous solution of sodium dihydrogen phosphate, NaH2PO4. Use the...
Calculate the pH of a 0.1620 M aqueous solution of sodium dihydrogen phosphate, NaH2PO4. Use the Tables link on the toolbar for any equilibrium constants that are required. pH =
10. What is the [CH3COOH ]/[CH3COO– ] ratio in an acetic acid/sodium acetate buffer at pH...
10. What is the [CH3COOH ]/[CH3COO– ] ratio in an acetic acid/sodium acetate buffer at pH = 4.90? (Ka = 1.8 x 10–5 ) a. 0.31 b. 0.70 c. 1.45 d. 2.41 e. 4.90 11. How many grams of NaCH3COO should be added to 250 mL of 0,100 M CH3COOH when the above solution is prepared? a. 0.431 g b. 2.95 g c. 5.66 g d. 1.43 g e.11.9 g
You are instructed to create 300. mL of a 0.34 M phosphate buffer with a pH...
You are instructed to create 300. mL of a 0.34 M phosphate buffer with a pH of 7.3. NaH2PO4 is the acid component of the buffer. Na2HPO4 is the base component of your buffer. What is the molarity needed for the acid component of the buffer? What is the molarity needed for the base component of the buffer? How many moles of acid are needed for the buffer? How many moles of base are needed for the buffer? How many...
Calcium dihydrogen phosphate, Ca(H2PO4)2, and sodium hydrogen carbonate, NaHCO3, are ingredients of baking powder that react...
Calcium dihydrogen phosphate, Ca(H2PO4)2, and sodium hydrogen carbonate, NaHCO3, are ingredients of baking powder that react with each other to produce CO2, which causes dough or batter to rise: Ca(H2PO4)2 (s) + NaHCO3 (s) ------------ CO2(g) + H2O(g) + CaHPO4(s) + Na2HPO4(s) (unbalanced) If the baking powder contains 31.0% NaHCO3 and 35.0% Ca(H2PO4)2 by mass: a.) How many moles of CO2 are produced from 1.41 g of baking powder? b.) If 1 mol of CO2 occupies 37.0 L at 350...
Be sure to answer all parts. Calcium dihydrogen phosphate, Ca(H2PO4)2, and sodium hydrogen carbonate, NaHCO3, are...
Be sure to answer all parts. Calcium dihydrogen phosphate, Ca(H2PO4)2, and sodium hydrogen carbonate, NaHCO3, are ingredients of baking powder that react with each other to produce CO2, which causes dough or batter to rise: Ca(H2PO4)2(s) + NaHCO3(s) → CO2(g) + H2O(g) + CaHPO4(s) + Na2HPO4(s)[unbalanced] If the baking powder contains 31.0% NaHCO3 and 35.0% Ca(H2PO4)2 by mass: (a) How many moles of CO2 are produced from 9.66 g of baking powder? mol CO2 (b) If 1 mol of CO2...
Calcium dihydrogen phosphate, Ca(H2PO4)2, and sodium hydrogen carbonate, NaHCO3, are ingredients of baking powder that react...
Calcium dihydrogen phosphate, Ca(H2PO4)2, and sodium hydrogen carbonate, NaHCO3, are ingredients of baking powder that react with each other to produce CO2, which causes dough or batter to rise: Ca(H2PO4)2(s) + NaHCO3(s) → CO2(g) + H2O(g) + CaHPO4(s) + Na2HPO4(s)[unbalanced] If the baking powder contains 31.0% NaHCO3 and 35.0% Ca(H2PO4)2 by mass: (a) How many moles of CO2 are produced from 6.85 gof baking powder? ____mol CO2 (b) If 1 mol of CO2 occupies 37.0 L at 350°F (a typical...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT