What it the pH of middot solution that is 0.01 M MCI? What is the pH of middot v

Question

What it the pH of middot solution that is 0.01 M MCI? What is the pH of middot volition of 0.001 M NaOH? A buffer a solution that resist changes in pH when an acid or has is added a neutral solution a kind of aspirin a mixture of a strong acid and a weak acid If HCl was added to water would the pH go up or down? What would he the pH of a buffer made by from equal amounts of acetic add (pKa = 4.75) and sodium acetate? What would the pH he a buffer using a ten times as much acetic acid as sodium acetate? If a 5 mL sample of HCl was titrated to neutrality with 26 mL of 0.1 M NaOH, what is the Molarity of the acid solution?

Explanation / Answer

Q1

pH of HCl = 0.01

pH = -log(0.01) = 2

B)

pH for 0.001 NaOH

NaOH = OH

[OH-] = 0.001

pOH = -log(0.001) = 3

pH = 14-3 = 11

Q3

A buffer is a solution that will resist changes of pH when acid/base is added

Q4

HCl is acidic, so H+ increases, if H+ increases, pH must drop, i.e. goes down

Q5

pH for

[Acetate] = [Acid]

pH = pKa + loG(A-/HA)

pH = pKa log(1)

pH = pKa = 4.75

Q6

for 10x ratio

pH = pKa + log(A-/HA)

pH = 4.75 + log(1/10) = 3.75

Q7

mmol of acid = MV

mmol of base = 26*0.1 = 2.6

so

M = mmol/V = 2.6/5 = 0.52 M of Acid

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