Rank the following equimolar aqueous buffer solutions at 25 degree C in terms of
ID: 523341 • Letter: R
Question
Rank the following equimolar aqueous buffer solutions at 25 degree C in terms of increasing pH (lowest pH on the left): NaOCl/HOCl; KF/HF; NaHCO_3/Na_2 CO_3; HCO_3^-/H_2 CO_3; HPO_4^2-/PO_4^3- As shown, the pH of a bicarbonate/carbonic acid buffer is plotted vs pH at 37 degree C. Please the questions appearing below. The pH of equimolar buffer is: _____ The pK_a where the rate of change of pH is at its minimum (where the buffer most effective) is: _____ The normal pH of human blood is outside the usual range of buffer efficacy (YES or NO)? Given that the [H_2 CO_3 (aq)] increases as the amount of CO_2 dissolved in the blood increases, the blood pH will (INCREASE or DECREASE) as a result of increased dissolved CO_2? Please answer below: The mole ratio of base vs acid needed to create a pH of 7.00 would be: _____Explanation / Answer
Q3.
lowest pH -->
NaOCl/HOCl = 8.5 approx
KF/HF = 3.14 approx
NaHCO3/ Na2CO3 = 10.3 approx
HCO3-/H2CO3 = 7 approx
HPO3-2 / PO3- = 12
then
KF/HF < NaOCl/HOCl < HCO3-/H2CO3 < NaHCO3/ Na2CO3 < HPO3-2 / PO3-
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