Ask question

Ask question

All categories

2 years ago

10

The standard Gibbs energy of reaction, ÄG°, for the dissociation of phenol is 56.4 kJ mol-1 at 298 K. Calculate the pKa of pheno

l.
a.
9.88
c.
4.12
b.
22.8
d.
5.24

1 answer:

Neporo4naja [7]2 years ago

4 0

Answer:

a.

9.88

Explanation:

ΔG = - 2.303 RT log Ka

ΔG is change in free energy at temperature T , Ka is equilibrium constant

- 56.4 x 10³ = 2.303 x 8.31 x 298 logKa

- log Ka = 9.88 .

pKa = 9.88 .

You might be interested in

Balance the following chemical equations

grigory [225]

Answer:

1. 2,3,2

2. 4,5,2

3. 3,1,1

Explanation:

7 0

2 years ago

How do you balance Na + MgF{2} Na + Mg?

cricket20 [7]

2Na+MGF2=2NAF+MG
I hope that's right :)

6 0

2 years ago

a cylinder rod formed from silicon is 46.0 cm long and has a mass of 3.00 kg. the density of silicon is 2.33 g/cm³. what is the

Gnesinka [82]

$d=\frac{m}{V}\\\\
V=\pi r^{2}H\\$ $d=\frac{m}{\pi r^{2}H} \ \ \ |*\pi r^{2}H\\\\
d \pi r^{2}H=m \ \ \ |:d \pi H\\\\
r^{2}=\frac{m}{d \pi H}\\\\
r=\sqrt{\frac{m}{d \pi H}}\\\\
2r=d\\\\
d=2\sqrt{\frac{m}{d \pi H}}$

$H=43cm\\
d=2.33\frac{g}{cm^{3}}\\
m=3kg=3000g\\\\
d=2\sqrt{\frac{m}{d \pi H}}=2*\sqrt{\frac{3000g}{2.33\frac{g}{cm^{3}} * \pi * 43cm}}=2*\sqrt{\frac{3000}{100,19\pi \frac{1}{cm^{2}}}}\approx6,17cm$

7 0

2 years ago

Why is water in the gas phase when it comes out of a volcano?

umka2103 [35]

Due to lava which heats water where water vapour is comes

4 0

2 years ago

Read 2 more answers

Which half reaction can occur at the abode in a voltaic cell?

Digiron [165]

The oxidation half-reaction occurs at one electrode (the anode), and the reduction half-reaction occurs at the other (the cathode). When the circuit is closed, electrons flow from the anodeto the cathode.

3 0

2 years ago

Read 2 more answers