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According to the equation, how many grams of sodium acetate will you need to add to 125 mL of 0.100 M acetic acid to make a pH=4.74 buffer?

What is the actual pH of the resulting buffer when you add that many grams of sodium acetate to 125 mL of 0.100 M acetic acid?

If I want to make the buffer by adding 0.100 M NaOH instead of sodium acetate, how many milliliters of NaOH are needed to reach pH=4.74?

If I add enough water to the above buffer to make the total volume 1.00 L, what's the new pH?

How many milliliters of 0.25 M HCl will be needed to change the pH of the dilute buffer by 1 pH unit?

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