Chem Equations

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Match the correct equation to solve each problem.

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What is the pH of 0.1M hydrochloride acid?

What is the pH of 0.1M Ba(OH)2

What is the percentage ionisation of naproxen with a pKa of 4.2 in a solution at pH 7.4

What is the percentage ionisation for benzocaine with a pKb of 4.64 in a solution at 9.0 pH

What is the pH of a 0.1M sodium hydroxide solution?

You are making up a buffer solution of dihydrogenphosphate (acid, pKa 7.21) and hydrogen phosphate (conjugated base). You require a pH of 7.6. What is the ratio of base to acid concentration do you need?

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100/ 1+antilog(pKa - pH)

pH = pKa + log [conj.base] / [acid]

[H+][OH-]=1x10-14 — -log[H+]

100 / 1+antilog(pH - pKw + pKb)

-log[H+]

14 - (-log[OH])