1. What mass, in g, of KF (m= 58.096 g/mol) needs to be added to 152.2 mL of 0.490 M HF to achieve a solution with a pH

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1 What Mass In G Of Kf M 58 096 G Mol Needs To Be Added To 152 2 Ml Of 0 490 M Hf To Achieve A Solution With A Ph 1 (225.87 KiB) Viewed 26 times

1. What mass, in g, of KF (m= 58.096 g/mol) needs to be added to 152.2 mL of 0.490 M HF to achieve a solution with a pH of 3.92. Note: the pk, of HF is 3.20, you may assume the 5% approximation holds, and you may assume that the addition of the solid does not change the volume. INSTRUCTIONS: Input your answer to 3 significant digits in scienfitic notation (example: 1.23E-4) and DO NOT include the units. 9 Submit Answer Tries 0/3 2. What volume, in mL of 0.745 M C6H5OH needs to be added to 643.1 mL of 0.335 M KC6H5O to achieve a solution with a pH of 9.5. Note: the pk₂ of CsH5OH is 10.00, you may assume the 5% approximation holds, and you may assume that the volumes are additive. INSTRUCTIONS: Input your answer to 4 significant digits in standard notation (example: 1.234) and DO NOT include the units. mL Submit Answer Tries 0/3 3. What is the pH of a buffer solution prepared by adding 1.15x103 mL of 0.064 M KOH to 238 mL of 0.770 M HF? Note: the pk, of HF is 3.20, you may assume the 5% approximation holds, and you may assume that the volumes are additive. INSTRUCTIONS: Input your answer to 2 decimal places in standard notation (example: 1.23) and DO NOT include the units. pH = Submit Answer Tries 0/3 4. What volume, in mL of 0.554 M HNO3 needs to be added to 314 mL of 0.202 M KF to achieve a solution with a pH of 3.20. Note: the pk of KF is 10.80, you may assume the 5% approximation holds, and you may assume that the volumes are additive. INSTRUCTIONS: Input your answer to 4 significant digits in standard notation (example: 1.234) and DO NOT include the units. mL