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MCAT General Chemistry Practice Top Notch Strategies.
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Whether a chemical is an acid or base depends on whether Ka or Kb is greater Because Ka x Kb = Kw, Ka = 2.3 x 10^3, suggesting that it is an acid Because Ka 1, it is a strong acid What is the pH of a solution with a hydronium concentration [H3O+] = 10^4 M -4 -8 10 4 pH is the negative logarithm of the molar concentration of hydrogen ions Equivalently, the pH is the logarithm of the molar concentration of hydronium pH = -log[H3O+] = -4 Nitrogen dioxide (NO2) is a toxic pollutant that has been implicated as a risk factor for Sudden Infant Death Syndrome. The following system obeys second-order kinetics: 2 NO2 - NO3 + NO (slow) NO3 + CO - NO2 + CO2 (fast) What is the rate law for this reaction?
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