Calculate the pH of a buffer solution that contains 0.56 M NaH2PO4 and 0.21M Na2HPO4 Calculate...

Question

Question

Calculate the pH of a buffer solution that contains 0.56 M NaH₂PO₄ and 0.21M Na₂HPO₄

Calculate the change in pH if 0.050 g of solid NaOH is added to 200 mL of the solution in the problem above.

science chemistry

Answer 1

Answer #1

0 bos bubbes solution PH = pka + loq salt) Cacid ] Ka for Na H₂ POy = 6.2 x 10 8 So, pka = 7.21 PH= 7.21 + log 0.21 0.56 PH:

Answer 2

Similar Homework Help Questions

A) A buffer solution contains 0.373 M NaH2PO4 and 0.348 M Na2HPO4. Determine the pH change...

A) A buffer solution contains 0.373 M NaH2PO4 and 0.348 M Na2HPO4. Determine the pH change when 0.083 mol HBr is added to 1.00 L of the buffer. pH change = ___ B) A buffer solution contains 0.330 M NH4Br and 0.379 M NH3 (ammonia). Determine the pH change when 0.086 mol HClO4is added to 1.00 L of the buffer. pH after addition − pH before addition = pH change = ___
A buffer solution contains 0.235 M NaH2PO4 and 0.371 M Na2HPO4 If 0.0297 moles of nitric...

A buffer solution contains 0.235 M NaH2PO4 and 0.371 M Na2HPO4 If 0.0297 moles of nitric acid are added to 225 mL of this buffer, what is the pH of the resulting solution ? (Assume that the volume change does not change upon adding nitric acid pH =
a) What are the concentrations of Na2HPO4 and NaH2PO4 in a 0.30 M phosphate buffer solution...

a) What are the concentrations of Na2HPO4 and NaH2PO4 in a 0.30 M phosphate buffer solution pH 7.0? Use pKa 6.82 b) Describe how you would prepare 250 mL of the buffer in part (a) given that you have available to you a 1.0 M stock solution of NaH2PO4 and solid Na2HPO4(FW 141.96 g/mol). Provide your answer in milliliters of NaH2PO4 and grams of Na2HPO4. c) Suppose you use 100 ml of this buffer in an experiment and 0.003 mol...

A buffer solution contains 0.387 M NaH2PO4 and 0.394 M Na HPO4. Determine the pH change...

A buffer solution contains 0.387 M NaH2PO4 and 0.394 M Na HPO4. Determine the pH change when 0.094 mol NaOH is added to 1.00 L of the buffer. pH after addition - pH before addition = pH change Determine the pH change when 0.117 mol NaOH is added to 1.00 L of a buffer solution that is 0.498 M in HCIO and 0.235 M in CIO pH after addition - pH before addition - pH change =
A buffer solution contains 0.347 M KH2PO4 and 0.269 M Na2HPO4. Determine the pH change when...

A buffer solution contains 0.347 M KH2PO4 and 0.269 M Na2HPO4. Determine the pH change when 0.079 mol NaOH is added to 1.00 L of the buffer. pH after addition − pH before addition = pH change =
A) A buffer solution contains 0.255 M hypochlorous acid and 0.394 M potassium hypochlorite. If 0.0590...

A) A buffer solution contains 0.255 M hypochlorous acid and 0.394 M potassium hypochlorite. If 0.0590 moles of perchloric acid are added to 250. mL of this buffer, what is the pH of the resulting solution ? (Assume that the volume change does not change upon adding perchloric acid) pH = B) A buffer solution contains 0.462 M ammonium bromide and 0.311 M ammonia. If 0.0351 moles of potassium hydroxide are added to 225 mL of this buffer, what is...

1. A buffer solution contains 0.491 M KH2PO4 and 0.368 M Na2HPO4. Determine the pH change...

1. A buffer solution contains 0.491 M KH2PO4 and 0.368 M Na2HPO4. Determine the pH change when 0.102 mol HClO4 is added to 1.00 L of the buffer. pH change = 2. A buffer solution is 0.430 M in CH3COOH and 0.268 M in CH3COONa. If Ka for CH3COOH is 1.8×10-5, what is the pH of this buffer solution?
1) Solution Components A 1 mL 100 mM NaH2PO4 + 9 mL 100 mM Na2HPO4 B...

1) Solution Components A 1 mL 100 mM NaH2PO4 + 9 mL 100 mM Na2HPO4 B 5 mL 100 mM NaH2PO4 + 5 mL 100 mM Na2HPO4 C 9 mL 100 mM NaH2PO4 + 1 mL 100 mM Na2HPO4 D 10 mL 100 mM NaH2PO4 stock solution E 10 mL 100 mM Na2HPO4 stock solution F 10 mL distilled water pKa of phosphate: 6.8 How would you calculate the pH of each equation using the Henderson Hasselbalch equations? 2) Tris...
For a buffer that contains NaH2PO4 and Na2HPO4, match the components.

For a buffer that contains NaH2PO4 and Na2HPO4, match the components. H2PO4- Na2HPO4 HPO42- NaH2PO4

a) Calculate the pH of a buffer system that contains o.200 M of NH3(aq) and o.200...

a) Calculate the pH of a buffer system that contains o.200 M of NH3(aq) and o.200 M of NH4Cl(aq). The Kb of NH3(aq) is 18 x 10-5. Consult Textbook Numerical Answer pH b) Calculate the change in pH when 6.00 mL of 100 M HCl is added to 100.0 mL of the buffer solution. Numerical Answer: c) Calculate the change in pH when 6.00 mL of o.100 M NaOH is added to 100.0 mL of the buffer solution. Numerical Answer: