Citric Acid has 3 pKas: 3.13, 4.76, and 6.39. How many grams of sodium citrate monobasic...
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.
Homework Answers
Solution will be acidic buffer ( combination of weak acid +
acid's salt with strong base).
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Citric Acid has 3 pKas: 3.13, 4.76, and 6.39. How many grams of
sodium citrate monobasic...
Calculate the molar ratio of citric acid and sodium citrate required to prepare 40mM buffer pH...
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
A solution of sodium citrate (monobasic) is prepared to a formal concentration of 0.2 M. If...
A solution of sodium citrate (monobasic) is prepared to a formal concentration of 0.2 M. If the pKa's for the triprotic citric acid molecule are 3.13, 4.76, 6.40 what is the approximate pH of this solution?
A solution of sodium citrate (monobasic) is prepared to a formal concentration of 0.2 M. If...
A solution of sodium citrate (monobasic) is prepared to a formal concentration of 0.2 M. If the pKa's for the triprotic citric acid molecule are 3.13, 4.76, 6.40 what is the approximate pH of this solution
Calculate the weight of citric acid – H2O (MW = 210 g/mol) and NaOH (MW 40g/mol)...
Calculate the weight of citric acid – H2O (MW = 210 g/mol) and NaOH (MW 40g/mol) needed to prepare 1.0 L of citrate buffer which is 0.2 M in Na+ and pH 5.2 (pK1= 3.13, pK2= 4.76, pK3= 6.4. Answers: 24.2 g citric acid – H2O and 8.0 g NaOH
1. What is the pH of a buffer solution prepared with a 0.4 M sodium citrate...
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...
29. A student has 200 mL of a buffer solution that consists of 0.700 M of citric acid and 0.500 M sodium citrate. W...
29. A student has 200 mL of a buffer solution that consists of 0.700 M of citric acid and 0.500 M sodium citrate. What is the pH of this solution? The pKal of citric acid is 3.06. 30. Give the formula and name of a metal hydroxide base.
How much citric acid (99% concentration; Molecular Weight:192.12; linear formula: HOC(COOH)(CH2COOH)2) do I need to add...
How much citric acid (99% concentration; Molecular Weight:192.12; linear formula: HOC(COOH)(CH2COOH)2) do I need to add to a lake (volume of lake:1233 cubic meters; m3) to lower the pH from 10.51 to 7. Lake Hardness: 412 mg/l CaCO3. Lake Alkalinity: 89.8 mg/L CaCO3.
: Preparing a 0.050 M buffered solution using a conjugate weak acid/weak base pair of sodium...
: Preparing a 0.050 M buffered solution using a conjugate weak acid/weak base pair of sodium citrate tribasic and sodium citrate dibasic. You will prepare 100 mL of buffered solution with pH = 6.00. The formal concentration of this buffer should be 0.050 F (i.e., the total concentration of the weak acid and its conjugate base is 0.050 M). Find the total amount (g or mL) of each species you will have to add to 100 mL of water to...
4. How much of (in mL) 0.15 M acetic acid (pKa 4.76) is needed to mix...
4. How much of (in mL) 0.15 M acetic acid (pKa 4.76) is needed to mix with 40 mL of 0.15 M sodium acetate to make a buffer of pH = 4.50 of 250 mL? (molar mass of acetic acid and sodium acetate are 60.0 g/mol and 82.0 g/ml, pKa of acetic acid is 4.76) (extra 10 pt)
Given 0.5 M solution of acetic acid (pKa = 4.76) and solid sodium acetate (Mr =...
Given 0.5 M solution of acetic acid (pKa = 4.76) and solid sodium acetate (Mr = 82 g/mol), describe how you would go about preparing 500 mL of 0.2M acetate buffer pH 4.0.
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...
29. A student has 200 mL of a buffer solution that consists of 0.700 M of citric acid and 0.500 M sodium citrate. What is the pH of this solution? The pKal of citric acid is 3.06. 30. Give the formula and name of a metal hydroxide base.
4. How much of (in mL) 0.15 M acetic acid (pKa 4.76) is needed to mix with 40 mL of 0.15 M sodium acetate to make a buffer of pH = 4.50 of 250 mL? (molar mass of acetic acid and sodium acetate are 60.0 g/mol and 82.0 g/ml, pKa of acetic acid is 4.76) (extra 10 pt)
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