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A student wants the molar conductivity in S m²/mol. The… | StemPy Lab
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A student wants the molar conductivity in S m²/mol. The solution has κ = 4.0 × 10⁻⁴ S/cm and c = 0.0080 mol/L. Which value is right?
Chemistry
Medium
High School (11–12)
Electrochemistry › Conductance, Electrolysis and Batteries
AP
A-Level
IB
Created by
StemPy Lab
A student wants the molar conductivity in
S m
2
/
mol
\text{S m}^2/\text{mol}
S m
2
/
mol
. The solution has
κ
=
4.0
×
10
−
4
S/cm
\kappa = 4.0 \times 10^{-4}\ \text{S/cm}
κ
=
4.0
×
1
0
−
4
S/cm
and
c
=
0.0080
mol/L
c = 0.0080\ \text{mol/L}
c
=
0.0080
mol/L
. Which value is right?
5.0
×
10
−
5
S m
2
/
mol
5.0 \times 10^{-5}\ \text{S m}^2/\text{mol}
5.0
×
1
0
−
5
S m
2
/
mol
5.0
×
10
−
3
S m
2
/
mol
5.0 \times 10^{-3}\ \text{S m}^2/\text{mol}
5.0
×
1
0
−
3
S m
2
/
mol
5.0
×
10
−
2
S m
2
/
mol
5.0 \times 10^{-2}\ \text{S m}^2/\text{mol}
5.0
×
1
0
−
2
S m
2
/
mol
5.0
S m
2
/
mol
5.0\ \text{S m}^2/\text{mol}
5.0
S m
2
/
mol
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← Two weak monobasic acids, HA and HB, have the same limiting molar conductivity. In solutions of equal concentration, their molar conductivities are 4.0 and 20.0 S cm²/mol. The degrees of dissociation are small. What is the ratio Ka(HB) / Ka(HA)?
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