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Adding HCl Solution to Buffer 1 Adding NaOH Solution to Buffer 1 Calculate the i

ID: 514432 • Letter: A

Question

Adding HCl Solution to Buffer 1 Adding NaOH Solution to Buffer 1 Calculate the initial concentration of C_2H_3O_2 and H C_2H_3O_2 in Buffer 1. Calculate the initial pH of the Buffer 1 solution. The K_a of Acetic Acid is 1.8 times 10^-5. Is this value different from the measured pH? Explain. Determine the approximate buffer capacity of Buffer 1 using the data from above. (Determine the volume of acid and base required to change the pH by 1 unit.) Acid buffer capacity _____ Base Buffer capacity _____ Calculate the buffer capacity for 1L of Buffer 1 if 0.1M NaOH was added to it. (Express answer in milliliters) would this be the same buffer capacity if 0.1M HCl was added to Buffer 1? Explain

Explanation / Answer

1.Intial pH=4.33]=

[H+]=4.677*10-5 M

So CH3COOH---->CH3COO-+H+

So [CH3COOH]=[CH3COO-]=[H+]=4.677*10-5 M

2.

Initial

pH=pKa=-log Ka=4.74

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