Question

The dissociation constant of weak acid is 1×10^-4 in order to prepare a buffer solution with a pH=5 the salt/acid ratio should be?

Answer 1

Answer:

1:4 ..mark as brainliest answer pls I need one more braily answer to become virtuso

Answer 2

using formula, pH = pKa + log [salt/acid ]

given, pH = 5, Ka = 1 × 10-⁴

we know, pKa = -logKa

so, pKa = -log (1 × 10-⁴) = 4

so, 5 = 4 + log [salt/acid]

⇒1 = log [salt]/[acid ]

⇒10¹ = [salt ]/[acid ]

⇒[salt ]/[acid ] = 10/1

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