The relationship between pH and pKa of buffer solution in given atomic view:
In figure I pH= pKa ( since [HA] =[A-] )
In figure II pH > pKa ( since [A-] > [HA] )
In figure III pH < pKa ( since [A-] < [HA] )
The pH and pKa are related by the Henderson-Hasselbalch equation. It should not be used for concentrated solutions, extremely low pH acids, or extremely high pH bases because it is simply an approximation.
pH = pKa + log(conjugate base/weak acid).
pH equals pKa plus log ([A-] / [HA]).
pH is determined by dividing the weak acid concentration by the log of the conjugate base concentration and the pKa value.
About halfway to the equivalence point:
pH = pKa
It's important to note that this equation is familiar with the connection because it is sometimes written for the Ka value rather than the pKa value.
pKa = – log Ka
Hence, value of pH depend on relative concentration of [A-] and HA]
To know more about Ka.
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B
atoms in a solid can move very little because of how compact they are
in a liquid atoms move a little more freely
in a gas atoms are bouncing fast as they are very spaced out
Answer:
The molecular weight is 77.7 kg/mol
Explanation:
The molecular mass of hemoglobin is equal to:

Where
R = molar gas constant = 8.315 J/K mol
p = density = 0.998 g/mL
V = specific volume = 0.755 mL/g
s = sedimentation rate = ?
D = diffusion rate = 7x10⁻¹¹m²/s
T = temperature = 303 K
The sedimentation rate is equal to:

Where
w = angular velocity = 39300 rpm = 246929.18 rad/min
xb,30 = boundary midpoint distance at 30 min = 4.525 + 0.074 cm
t = time = 30 min
xb,0 = boundary midpoint distante at 0 min = 4.525 cm

The molecular weight is:

<span>Each mole contains Avagodro's number of atoms i.e. 6.023x10^23, so
3 moles x 6.023x10^23 atoms/mole = 18.069x10^23 atoms = 1.8x19^24 atoms </span>