In a titration experiment, a 10.0 mL sample of hydrofluoric acid, HF(aq), is titrated with a with 0.223 mol/L of NaOH(aq). After 3 trials, it was determined that an average of 37.55
mL of the sodium hydroxide solutions was required. Calculate the concentration of the
hydrofluoric acid.

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

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