Consider a buffer made by adding 57.9 g of (CH₃)₂NH₂I to 250.0 mL of 1.42 M (CH₃)₂NH (Kb = 5.4 x 10⁻⁴) What is the pH of the buffer after 0.300 mol of H⁺ have been added? What is the pH of the buffer after 0.120 mol of OH⁻ have been added? A 20.0 mL solution of NaOH is neutralized with 14.2 mL of 0.200 M HBr. What is the concentration of the original NaOH solution?

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Consider a buffer made by adding 57.9 g of (CH₃)₂NH₂I to 250.0 mL of 1.42 M (CH₃)₂NH (Kb = 5.4 x 10⁻⁴) What is the pH of the buffer after 0.300 mol of H⁺ have been added?

What is the pH of the buffer after 0.120 mol of OH⁻ have been added?

A 20.0 mL solution of NaOH is neutralized with 14.2 mL of 0.200 M HBr. What is the concentration of the original NaOH solution?

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