What Mass of Sodium Nitrite Must Be Added to 350

question 50

Multiple Choice

What mass of sodium nitrite must be added to 350. mL of water to give a solution with pH = 8.40? [K_a(HNO₂) = 5.6 * 10^-4]

• A) 68 g
• B) 1.7 * 10^-4 g
• C) 0.039 g
• D) 8.3 g
• E) 24 g

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