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4 years ago

Acetic acid is a weak acid in water because it is:

Chemistry

1 answer:

Sladkaya [172]4 years ago

6 0

Answer:

The correct answer is <em>e. only slightly dissociated into ions.</em>

Explanation:

Acetic acid (CH₃COOH) is one of the best known weak acids. It dissociates into its ions as follows:

CH₃COOH (aq) ⇄ H⁺ (aq) + CH₃COO⁻ (aq)

The dissociation constant Ka is low: aproximately 1.75 x 10⁻⁵. That indicates the equilibrium is shifted to the left and the acid is only slightly dissociated into its ions (H⁺ and CH₃COO⁻).

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Chlorine pentafluoride gas is collected at -17.0 °C in an evacuated flask with measured volume of 35.0 L. When all the gas has b

Svet_ta [14]

Answer:

1. The mass of Chlorine pentafluoride, ClF5, is 39.16g

2. The number of mole of Chlorine pentafluoride, ClF5, is 0.3mole

Explanation:

1. To solve the mass of Chlorine pentafluoride, ClF5, first, let us calculate the molar mass of ClF5. This is illustrated below:

Molar Mass of ClF5 = 35.5 + (5 x 19) = 35.5 + 95 = 130.5g/mol

From the ideal gas equation:

PV = nRT (1)

Recall:

Number of mole(n) = mass (m) /Molar Mass(M)

n = m/M

Now substituting the value of n in equation 1, we have:

PV = nRT

PV = mRT/M

Now we can obtain the mass of Chlorine pentafluoride ClF5 as follow:

Data obtained from the question include:

T (temperature) = -17.0 °C = - 17 + 273 = 256K

V (volume) = 35L

P (pressure) = 0.180 atm

R (gas constant) = 0.082atm.L/Kmol

m (mass of Chlorine pentafluoride) =?

M (molar mass of Chlorine pentafluoride) = 130.5g/mol

PV = mRT/M

0.180 x 35 = m x 0.082 x 256/ 130.5

Cross multiply to express in linear form as shown below:

m x 0.082 x 256 = 0.180x35x130.5

Divide both side by 0.082 x 256

m = (0.180x35x130.5) /(0.082x256)

m = 39.16g

Therefore, the mass of Chlorine pentafluoride, ClF5, is 39.16g

2. The number of mole of ClF5 can be obtained as follow:

Mass of ClF5 = 39.16g

Molar Mass of ClF5 = 130.5g/mol

Mole of ClF5 =?

Number of mole = Mass /Molar Mass

Mole of ClF5 = 39.16/130.5g

Mole of ClF5 = 0.3mole

8 0

4 years ago

Read 2 more answers

12. Compare and contrast hydrogen bonds and van der Waals interactions.

mrs_skeptik [129]

Explanation:

Van der Waals interactions occur between any two or more molecules. They are caused by a fluctuation in electron density, as electrons are not actually fixed in a shell, but actually freely moving as a 'cloud of electron density'. This means that sometimes one end of a molecule can become more partially negatively charged as all electrons move to that side, and conversely it can attract the more partially positive end of a molecule (that has little electrons).

Hydrogen bonds only occur between molecules that contain oxygen, nitrogen and fluorine bonded to a hydrogen atom.

Hydrogen bonding is also the strongest intermolecular force there is, but not strong in comparison to ionic and covalent bonds. Therefore, hydrogen bonds are much stronger than Van der Waals forces. Hydrogen bonds only form if oxygen, nitrogen and fluorine are bonded to a hydrogen atom, as they have the greatest electronegativity differences (look at an electronegativity table), and when the overall molecule is polar (have unequal charges). This allows the molecule to be able to attract another molecule from one of the bonded atoms to a hydrogen atom.

4 0

3 years ago

How is chemical equilibrium achieved?

just olya [345]

Answer:

Explanation:

Equilibrium is achieved in a chemical reaction when there is a steady state with no change in concentrations.

So the answer is "When the concentrations of reactants and products are constant."

7 0

3 years ago

Nucleolus what is a nucleolus<br><br>

Ainat [17]

Answer:

Its a small dense spherical structure in the nucleus of a cell during interphase.

3 0

3 years ago

what is the coordination number of cobalt in [co(nh3)5cl](no3)2? what is the coordination number of cobalt in [co(nh3)5cl](no3)2

rewona [7]

The coordination number of cobalt in the complex is 6.

What is coordination compound?

The number of ligands attach to the central metal atom or ion in coordination sphere is coordination number.

In given complex 5 NH3 and 1 chlorine is attached in coordination sphere, so coordination number is 6.

To know more about the coordination number please follow the link:

https://brainly.in/question/1115267

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5 0

1 year ago