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Vesnalui [34]
1 year ago
10

write the balanced net ionic equations and the corresponding equilibrium constant expressions for the stepwise dissociation of t

he diprotic acid h2seo4.
Chemistry
1 answer:
nignag [31]1 year ago
8 0

The balanced net ionic equations: H₂SeO₄(aq) ⇄ 2H+(aq) + SeO₄2-(aq)

First step of balanced chemical dissociation of selenic acid in water:

H₂SeO₄(aq) ⇄ HSeO4⁻(aq) + H⁺(aq)

H₂SeO₄(aq) + H₂O(l) ⇄ HSeO4⁻(aq) + H₃O⁺(aq).

Ka is the acid dissociation constant or equilibrium constant, which quantifies the extent of acid dissociation (in this example selenic acid) in water.

Ka1 = [HSeO4⁻]·[H⁺] / [H₂SeO₄]

or Ka1 = [HSeO4⁻]·[H₃O⁺] / [H₂SeO₄]

Second step of balanced chemical dissociation of selenic acid in water:

HSeO4⁻(aq) ⇄ H+(aq) + SeO₄2-(aq)

Ka2 = [HSeO4⁻]·[H⁺] / [SeO₄2-]; equilibrium constant for second step of dissociation of selenic acid.

More info about diprotic acid: brainly.com/question/13479490

#SPJ4

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Explanation:

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3 years ago
Question 3<br> What part of a water molecule is the negatively charged side?
aleksandr82 [10.1K]

Answer:

The oxygen atom in water has a negative charge.

<h2>Definitions:</h2>

Polar molecule: A molecule in which the centroid of the positive charges is different from the centroid of the negative charges.

Oxygen: A colorless, odorless, gaseous element constituting about one-fifth of the volume of the atmosphere and present in a combined state in nature. It is the supporter of combustion in air and was the standard of atomic, combining, and molecular weights until 1961, when carbon 12 became the new standard. Symbol: O; atomic weight: 15.9994; atomic number: 8; density: 1.4290 g/l at 0°C and 760mm pressure.

Water: A transparent, odorless, tasteless liquid, a compound of hydrogen and oxygen, H2O, freezing at 32°F or 0°C and boiling at 212°F or 100°C. that in more or less impure state constitutes rain, oceans, lakes, rivers, etc.: it contains 11.188 percent hydrogen and 88.812 percent oxygen, by weight.

Hydrogen: A colorless, odorless, flammable gas that combines chemically with oxygen to form water: the lightest of the known element. Symbol: H; atomic weight: 1.00797; atomic number: 1; density: 0.0899 g/l at 0°C and 760 mm pressure.

Atom: Am atom is the smallest constituent particle of a chemical element which has the properties of that element. They re comprised of at least an electron and a portion, as is the case for Hydrogen. Atoms of all other elements however, contain at least one neutron.

Proton: A positively charged elementary particle that is a fundamental constituent of all atomic nuclei. It is the lightest and most stable baryon, having a charge equal in magnitude to that of the electron, a spin of 1/2, and a mass of 1.673 × 10-27kg. Symbol: P.

Electron: An elementary particle that is a fundamental constituent of matter, having a negative charge of 1.602 × 10-19 coulombs, ha mass of 9.108 × 10-31 kilograms, and spin of 1/23, and existing independently or as the component outside the nucleus of an atom.

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<h2>What is a negative charge?</h2>

A object has a negative charge when it consists of more electrons than protons.

With a partial positive charge on 2 Hs and a partial negative charge on oxygen, water molecules are polar molecules.

Actually, two hydrogen atoms and the core oxygen atom of water are covalently connected. Due to its greater electronegative nature than hydrogen, oxygen pulls the bound electron pair in the middle of the atom toward it.

When illustrating higher electron densities over oxygen, partial negative charge is used, whereas partial positive charge is used to illustrate lower densities over hydrogen atoms.

#SPJ2

3 0
2 years ago
The formulas for ethane, ethene, and ethyne are C 2 H 6 C2H6 , C 2 H 4 C2H4 , and C 2 H 2 C2H2 , respectively. Rank these compou
Anuta_ua [19.1K]

Answer:

Ethane (1.09 A) > Ethene(1.076 A) > Ethyne(1.06 A)

Explanation:

The types of bonds present are:

a) Ethane : single bond

b) Ethene : double bond (one sigma one pi)

c) Ethyne: triple bond (one sigma and two pi bonds)

More the number of bonds lesser the bond length.

Thus the order of bond length of carbon-carbon bond will be:

Ethane (1.09 A) > Ethene(1.076 A) > Ethyne(1.06 A)

6 0
4 years ago
Based on your understanding of how bond types influence a material’s properties, identify each of the following compounds as bei
siniylev [52]

Answer: The given compounds are identified as being made of ionic, covalent, or metallic bonds:

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  • Calcium chloride - Ionic bonds
  • Water - Covalent bonds

Explanation:

A bond formed by transfer of electrons from one atom to another is called an ionic bond. An ionic bond is formed between a metal atom and a non-metal atom.

A bond formed by transfer of electrons from one atom to another is called a covalent bond. A covalent bond is formed between two or more non-metal atoms only.

Steel is actually an alloy of carbon and iron where there is less than 2% carbon, 1% manganese and small amounts of silicon, phosphorus, oxygen and sulphur are present.

When atoms of metals are held together then bond formed between these atoms is called metallic bond.

Hence, steel is made of metallic bond.

Chemical formula of propane is CH_{3}CH_{2}CH_{3} as there are only non-metal atoms are present. So, sharing of electrons takes place in such atoms due to which covalent bonding will be there.

Hence, propane is made up of covalent bonds.  

Calcium chloride contains a metal and a non-metal atom. This means that electrons are being transferred from calcium atom to the chlorine atom. Hence, bond present in calcium chloride is ionic bond.

Water has chemical formula H_{2}O. Since, non-metal atoms are present there so sharing of electrons takes place between hydrogen and oxygen atoms. Hence, covalent bond is present in water.

Thus, we can conclude that given compounds are identified as being made of ionic, covalent, or metallic bonds:

  • Steel - Metallic bonds
  • Propane - Covalent bonds
  • Calcium chloride - Ionic bonds
  • Water - Covalent bonds
7 0
3 years ago
Scientific theories might be rejected because there is not yet enough information to explain the evidence supporting them. True
Oksanka [162]
True.

Hope this helps!
8 0
3 years ago
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