7. a) Calculate the pH of a 0.10 mol l-1-methylamine at 25 ° C. b) How...
7. a) Calculate the pH of a 0.10 mol l-1-methylamine at 25 ° C.
b) How many moles of HCl must be added to 0.25 l of solution (according to a) in order to obtain maximum buffer effect? What is pH? Show the calculations. Disregard volume changes
c) as the pH becomes in 1.00 l solution of a) after addition of 0.20 mol HCl then ignoring the volume change?
Homework Answers
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7. a) Calculate the pH of a 0.10 mol l-1-methylamine at 25 °
C.
b) How...
1. Determine the pH change when 0.063 mol HBr is added to 1.00 L of a...
1. Determine the pH change when 0.063 mol HBr is added to 1.00 L of a buffer solution that is 0.326 M in HF and 0.211 Min F. pH after addition - pH before addition = pH change = 2. A buffer solution contains 0.469 M CH3NH3Br and 0.323 M CH3NH2 (methylamine). Determine the pH change when 0.091 mol KOH is added to 1.00 L of the buffer. pH after addition - pH before addition = pH change = 1
What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M methylamine,...
What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M methylamine, CH3NH2, with 25.00 mL of 0.10 M methylammonium chloride, CH3NH3C1? Assume that the volume of the solutions are additive and that Kb = 3.70 times 10-4 for methylamine. 10.27 10.57 10.87 11.78 Which statement about buffers is true? Buffers have a pH = 7. Buffers consist of a strong acid and its conjugate base. A buffer does not change pH on addition of a...
A buffer solution contains 0.359 M CH3NH2Cl and 0.331 M CH3NH2 (methylamine). Determine the pH change...
A buffer solution contains 0.359 M CH3NH2Cl and 0.331 M CH3NH2 (methylamine). Determine the pH change when 0.090 mol HCIO4 is added to 1.00 L of the buffer. pH after addition - pH before addition - pH change A buffer solution contains 0.305 M NaHCO3 and 0.205 M Na2CO3. Determine the pH change when 0.061 mol HNO3 is added to 1.00 L of the buffer. pH change
What is the pH of 50 mL of a 1.0 mol/L methylamine (CH3NH2) solution after the...
What is the pH of 50 mL of a 1.0 mol/L methylamine (CH3NH2)
solution after the addition of 50 mL of a 0.5 mol/L solution of
HCl?
5. What is the pH of 50 mL of a 1.0 mol/L methylamine (CH3NH2) solution after the addition of 50 mL of a 0.5 mol/L solution of HCI?
Determine the pH increase of a solution after 0.10 mol of NaOH is added to 1.00...
Determine the pH increase of a solution after 0.10 mol of NaOH is added to 1.00 L of a solution containing 0.15 M HC2H3O2 and 0.20 M NaC2H3O2. If this same amount of NaOH was added to 1.00 L of pure water then what would be the pH increase of the resulting solution? Compare these two values. pH increase in buffer: ? pH increase in pure water: ?
10) A. Determine the pH change when 0.079 mol HCl is added to 1.00 L of...
10) A. Determine the pH change when 0.079 mol HCl is added to 1.00 L of a buffer solution that is 0.466 M in HClO and 0.364 M in ClO-. pH after addition − pH before addition = pH change = B. A buffer solution contains 0.419 M NaHCO3 and 0.285 M K2CO3. Determine the pH change when 0.102 mol KOH is added to 1.00 L of the buffer. pH after addition − pH before addition = pH change =
A buffer solution contains 0.437 M CH_3NH_3CI and 0.213 M CH_3NH_2 (methylamine). Determine the pH change...
A buffer solution contains 0.437 M CH_3NH_3CI and 0.213 M CH_3NH_2 (methylamine). Determine the pH change when 0.045 mol KOH is added to 1.00 L of the buffer. pH after addition - pH before addition = pH change =
A buffer solution contains 0.311 MCH, NH,CI and 0.362 M CHANH, (methylamine) Determine the pH change...
A buffer solution contains 0.311 MCH, NH,CI and 0.362 M CHANH, (methylamine) Determine the pH change when 0.098 mol HBr is added to 1.00 L of the buffer. pH after addition - pH before addition pH change
please answer its parts Determine the pH change when 0.111 mol NaOH is added to 1.00...
please answer its parts
Determine the pH change when 0.111 mol NaOH is added to 1.00 L of a buffer solution that is 0.379 M in HF and 0.350 M in F. pH after addition - pH before addition = pH change = A buffer solution contains 0.305 M CH3NH3Cl and 0.246 M CH3NH2 (methylamine). Determine the pH change when 0.063 mol NaOH is added to 1.00 L of the buffer. pH after addition - pH before addition = pH...
Calculate the volume of 0.20 mol L-1KH2PO4 and the volume of 0.10 mol L-1 NaOH required...
Calculate the volume of 0.20 mol L-1KH2PO4 and the volume of 0.10 mol L-1 NaOH required to prepare 50.0 mL of buffer with a formal (or total) concentration of H2PO4 - of 0.020 mol L-1 and a pH = 6.3.
1. Determine the pH change when 0.063 mol HBr is added to 1.00 L of a buffer solution that is 0.326 M in HF and 0.211 Min F. pH after addition - pH before addition = pH change = 2. A buffer solution contains 0.469 M CH3NH3Br and 0.323 M CH3NH2 (methylamine). Determine the pH change when 0.091 mol KOH is added to 1.00 L of the buffer. pH after addition - pH before addition = pH change = 1
What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M methylamine, CH3NH2, with 25.00 mL of 0.10 M methylammonium chloride, CH3NH3C1? Assume that the volume of the solutions are additive and that Kb = 3.70 times 10-4 for methylamine. 10.27 10.57 10.87 11.78 Which statement about buffers is true? Buffers have a pH = 7. Buffers consist of a strong acid and its conjugate base. A buffer does not change pH on addition of a...
A buffer solution contains 0.359 M CH3NH2Cl and 0.331 M CH3NH2 (methylamine). Determine the pH change when 0.090 mol HCIO4 is added to 1.00 L of the buffer. pH after addition - pH before addition - pH change A buffer solution contains 0.305 M NaHCO3 and 0.205 M Na2CO3. Determine the pH change when 0.061 mol HNO3 is added to 1.00 L of the buffer. pH change
What is the pH of 50 mL of a 1.0 mol/L methylamine (CH3NH2)
solution after the addition of 50 mL of a 0.5 mol/L solution of
HCl?
5. What is the pH of 50 mL of a 1.0 mol/L methylamine (CH3NH2) solution after the addition of 50 mL of a 0.5 mol/L solution of HCI?
A buffer solution contains 0.437 M CH_3NH_3CI and 0.213 M CH_3NH_2 (methylamine). Determine the pH change when 0.045 mol KOH is added to 1.00 L of the buffer. pH after addition - pH before addition = pH change =
A buffer solution contains 0.311 MCH, NH,CI and 0.362 M CHANH, (methylamine) Determine the pH change when 0.098 mol HBr is added to 1.00 L of the buffer. pH after addition - pH before addition pH change
please answer its parts
Determine the pH change when 0.111 mol NaOH is added to 1.00 L of a buffer solution that is 0.379 M in HF and 0.350 M in F. pH after addition - pH before addition = pH change = A buffer solution contains 0.305 M CH3NH3Cl and 0.246 M CH3NH2 (methylamine). Determine the pH change when 0.063 mol NaOH is added to 1.00 L of the buffer. pH after addition - pH before addition = pH...
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