A buffer solution contains and 0.486 M CH3NH2 (m Determine the pH change is added to 1.00 L of the b Kb (CH3NH₂) = 4.2 x 1 pH after addition - pH bef change =

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Chapter1: Chemical Foundations
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**Buffer Solution Problem**

A buffer solution contains 0.201 M CH₃NH₃Br and 0.486 M CH₃NH₂ (methylamine). Determine the pH change when 0.115 mol HBr is added to 1.00 L of the buffer. (Assume \( K_b (\text{CH}_3\text{NH}_2) = 4.2 \times 10^{-4} \).)

\[ \text{pH after addition} - \text{pH before addition} = \text{pH change} = \_\_\_\_ \]

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Transcribed Image Text:**Buffer Solution Problem** A buffer solution contains 0.201 M CH₃NH₃Br and 0.486 M CH₃NH₂ (methylamine). Determine the pH change when 0.115 mol HBr is added to 1.00 L of the buffer. (Assume \( K_b (\text{CH}_3\text{NH}_2) = 4.2 \times 10^{-4} \).) \[ \text{pH after addition} - \text{pH before addition} = \text{pH change} = \_\_\_\_ \] **Options:** - Submit Answer - Retry Entire Group *Note: 9 more group attempts remaining.*
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