Which of the following could you add to 100.0 mL of 1.0 M HCN to make a suitable buffer system? (There may be more than one correct answer.)
100.0 mL of 0.050 M NaCN, 100.0 mL of 0.20 M NaCN, 100.0 mL of 1.0 M NaCN, 100.0 mL of 0.050 M NaCl, 100.0 mL of 0.20 M NaCl,
100.0 mL of 0.050 M HCN, 100.0 mL of 0.20 M HCN, 100.0 mL of 1.0 M HCN, 50.0 mL of 1.0 M NaOH, 100.0 mL of 1.0 M NaCl,
50.0 mL of 1.0 M HCl, 100.0 mL of 1.0 M HCl, 150.0 mL of 1.0 M HCl, 150.0 mL of 1.0 M NaOH, 150.0 mL of 1.0 M HCN
Which of the following could you add to 100.0 mL of 1.0 M HCN to make...
Calculate the following: a. The pH of a 500.0 mL buffer solution containing 0.75 M HCN (Ka = 6.2 x 10^-10) and 0.55 M NaCN b. The pH of the above buffer after the addition of 100.0 mL of 1.0 M NaOH. c. The pH of the buffer if 100.0 mL of 1.0 M HCl was added to the solution in part a.
4. An aqueous buffer solution if made from 150.0 mL of a 1.50 M HCN solution and 200.0 mL of a 1.00 M NaCN solution. The Ka for HCN is 4.90 x 10-10. a. Calculate the initial pH of this buffer solution. b. Calculate the pH after adding 100.0 mL of 0.800 M HBr to the HCN/NaCN buffer. c. Calculate the pH after adding 100.0 mL of 0.800 M KOH to the HCN/NaCN buffer.
which one of the following is a buffer solution? a) 0.40 M HCN and 0.10 KCN b) 0.20 CH3COOH c) 1.0 M HNO3 and 1.0 NaNO3 d) 0.10 M KCN e) 0.50 M HCl and 0.10 NaCl
Which one of the following mixtures is a buffer solution? 0.40 M HCN and 0.10 KCN 0.20 M CH3COOH 1.0 M HNO3 and 1.0 M NaNO3 0.10 M KCN 0.50 M HCl and 0.10 NaCl
Calculate the pH of the following solutions: 50.0 mL 0.10 M acetic acid + 1.0 mL 1.0 M HCl 50.0 mL 0.10 M acetic acid + 1.0 mL 1.0 M NaOH 50.0 mL 0.10 M sodium acetate + 1.0 mL 1.0 M HCl 50.0 mL 0.10 M sodium acetate + 1.0 mL 1.0 M NaOH 50.0 mL 0.10 M acetic acid/sodium acetate buffer 50.0 mL 0.10 M acetic acid/sodium acetate buffer + 1.0 mL 1.0 M HCl 50.0 mL 0.10...
Question 8 (1 point) If there is 1.0 mole of HCN and 1.0 mole of NaCN in a 100.0 ml aqueous solution and then 0.1 mole of HCl is added what happens? Please make sure to mark all of the correct responses. The number of moles of HCN will increase. The number of moles of HCN will decrease. The number of moles of CN will increase. The number of moles of CN will decrease. The pH will increase. The pH...
What is the pH change when 4.0 mL of 1.0 M HCl is added to 100.0 mL of a solution that is 0.20 M NaH2PO4 and 0.20 M Na2HPO4?Determine the pH when 9.0 mL of 0.80 M NaOH is then added to the results of the first part.
Suppose you want to make 500 mL of a 0.20 M Tris buffer at pH 8.0. On the shelf in lab, you spot a bottle of 1.0 M Tris at pH 6.8 and realize you can start with that to make this new buffer. Assuming you have 5.0 M HCl and 5.0 M NaOH at your disposal, how could you make this 0.20 M Tris buffer at pH 8.0 from the 1.0 M Tris, pH 6.8? (The pKa of Tris...
A solution X is made by taking 10.00 ml of a 1.0 M solution and add enough water to make 100.0 ml total volume. Solution Y is made by taking 5.0 ml of solution X and diluting it again by adding it to 95 ml of water. Calculate the molarity of solutions X and Y. Calculate the molarity of the solution created when 50.0 ml of 0.132 M NaOH is mixed with 75.0 ml of 0.120 M NaOH ( assuming...
Which of the following will exhibit the greatest change in PH when 1.0 mL of 1.5 m NaOH is added to it? Explain How Buffers Work Question Which of the following will exhibit the greatest change in pH when 1.0 mL of 1.5 M NaOH is added to it? Select the correct answer below: O 50 mL of a buffer solution that is 0.20 M in CH,COOH and 0.20 M in NaCH,coo O 100 ml. of a buffer solution that...