5 points) I want to prepare a buffer at pH 3.50 using citric acid and monosodium...
Calculate the molar ratio of citric acid and sodium citrate required to prepare 40mM buffer pH 4.8 citric acid pka= 3.13, 4.76, 6.39
What is the ratio of citric acid (pK1 = 3.09) to monosodium citrate in a 1.0 M citric acid solution with a pH = 2.09
4. You want to prepare a buffer with a pH of 9.00. You decide to use NH3 and NH4CI, which has a pK-9.25. ( oase What ratio of [NH,)/[NH4ČI] is required to make this buffer? (5 points) a. PH-PKa tlog fA pLD-4.75 00
Suppose you want to prepare a buffer with a pH of 4.35 using formic acid. What ratio of [sodium formate]/[formic acid] do you need to make this buffer? Formic acid has a Ka of 1.8x10-4. Show work please.
1. What is the pH of a buffer solution prepared with a 0.4 M sodium citrate and 1% citric acid (pka for citric acid - 3.13, MW - 192 g/mol)? 8. A buffer solution is prepared using 0.4 mole of a weakly basic drug (pka - 10.1) and an unknown quantity of its salt. The final solution has a pH of 8.99. How much of the salt was used? 9. A buffer solution with a desired pH of 8.15 needs...
What is the pH of a buffer solution prepared with a 0.5 M sodium citrate and 1% citric acid (pKa for citric acid = 3.13, MW = 192 g/mole).
Citric Acid has 3 pKas: 3.13, 4.76, and 6.39. How many grams of sodium citrate monobasic (HOC(COONa)(CH2COOH)2) and citric acid (HOC(COOH)(CH2COOH)2) are needed to make 300 mL of a 10 mM citrate buffer of exactly pH 2.8? The molecular weight of sodium citrate monobasic (NaH7C6O7) is 214.11 g/mol and that of citric acid (H8C6O7) is 192.12 g/mol.
4. You want to prepare a buffer with a pH of 9.00. You decide to use NH3 and NH4CI, which has a pK2=9.25. a. What ratio of [NH3]/[NH4Cl] is required to make this buffer? (5 points) b. If the concentration of NH4Cl is 0.10M, what should the concentration of NH3 be? (3 points)
In mass production of citric acid, cultures of A. niger are fed on glucose or sucrose to produce citric acid. The citric acid is isolated using calcium hydroxide to yield calcium citrate salt, Ca3(C6H5O7)2. To convert back to citric acid, you set up a flow reactor where you flow 122 mg/hr of calcium citrate salt with dilute sulfuric acid, H2SO4. The unbalance reaction to obtain citric acid is H2SO4 + Ca3(C6H5O7)2 + O2 --> C6H8O7 + CaSO4 +H2O Balance the...
Question 3 10 pts 1.0 L of buffer solution is made from 0.17 mol citric acid and 0.11 mol sodium citrate. After adding 0.25 mol HCl to the buffer, what is the pH? Ignore the volume change. K, citric acid - 8.4e-4