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Amphetamine(C9H13N) is a weak base with a pKb of 4.2.?

Calculate the pH of a solution containing an amphetamine concentration of 240 mg/L.
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4 Answers

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Anya Stehr

Feb 20, 2025

Moles = 0.240 g / 135 g/mol=0.00178 initial concentration = 0.00178 MKb = 10^-6.3 x 10^-5 = x^2 / 0.00178-xx = [OH-]= 0.000335 MpOH = 3.47pH = 14 – pOH = 10.5... Show More
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A
Anya Stehr

Feb 20, 2025

I don’t understand where they got 10^-6.3 and 10^-5. I thought it would be 10^-4.2 but that’s not right.... Show More
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A
Anya Stehr

Feb 20, 2025

Why do you find Kb by using 10^-(Kb)? shouldnt it be 10^-(pKb)?... Show More
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