Chemistry, 28.01.2020 16:02 rdemp6105

What is the equilibrium constant of pure water at 25°c?

Answers: 1

Show answers

Answers

The equilibrium reaction, causes the water dissociation constant, Kw, is 1.01 × 10-14 at 25 °C. That is because every H+ (H3O+) ion these forms accompanied by the formation of an OH- ion, are the concentrations of these ions and in pure water the same thing can be calculated from Kw.

HOPED THIS HELP OUT ;)

Answer from: hartmat

The equilibrium constant of pure water is $K_{eq}=1\times 10^{-14}$

Explanation:

$H_2O+H_2O\rightleftharpoons H_3O^++OH^-$

$K_{eq}=\frac{[H_3O^+][OH^-]}{[H_2O][H_2O]}$

$K_i=K_{eq}\times [H_2O]}=\frac{[H_3O^+][OH^-]}{[H_2O]}$

$K_i=\text{Ionization constant of water}$

Since,the water is found to be poorly ionized ,concentration of pure water practically remains the same. So, concentration of water can be combined with K_i to give new constant known as ionic product of water that is K_w .

$K_w=K_i\times [H_2O]=[H_3O^+][OH^-]$

In pure water:

$[H_3O^+]=1\times 10^{-7} M]=[OH^-]$

$K_w=1\times 10^{-14}M^2$

$K_w=K_{eq}=1\times 10^{-14}$

Answer from: Quest

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.

Answer from: Quest

answer : (a) volume of the gas = 8.67 × $10^{-3}$ l

(b) second virial coefficient b = -1.21226 l/mole

solution : given, t = 300k

p = 20atm

z = 0.86

n = 8.2 mmoles = 8.2 × $10^{-3}$ moles

r = 0.082 l atm/k/mol

find, (a) volume of gas and (b) second virial coefficient b at 300k.

formula used : $z=\frac{pv}{nrt}$

and $z=1+\frac{b}{v}$

(a) $z=\frac{pv}{nrt}$

$v=\frac{znrt}{p}$

= $\frac{0.86\times 8.2\times[tex]10^{-3}$ \times 0.082\times 300}{20}[/tex]

= 8.67 × $10^{-3}$ l

(b) $z=1+\frac{b}{v}$

$b=(z-1)v$

= (0.00867-1) × 8.659

= - 8.5839 l/mole

Another question on Chemistry

Chemistry, 22.06.2019 06:00

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead

Answers: 2

Answer

Chemistry, 22.06.2019 15:30

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.

Answers: 2

Answer

Chemistry, 22.06.2019 15:30

The reactions of photosynthesis occur in the of plant cell? a.mitochondria. b. lysosomes. c. chloroplasts. d. chlorophyll

Answers: 1

Answer

Chemistry, 22.06.2019 19:30

Describe the forces both attractive and repulsive that occur as two atoms move closer together.