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NikAS [45]
3 years ago
12

Which phrases accurately describe acids? Check all that apply.

Chemistry
2 answers:
weqwewe [10]3 years ago
8 0

Answer: Option 1, 4 and 5 describe acids accurately.

Explanation:

Option 1: Acids have a sour taste because of the concentration of H^+ ion.

Option 2: They are corrosive in nature, that is they are not at all gentle with the skin and fabric as some acids intend to burn skin such as H_2SO_4 is a strong acid which can burn skin as well as fabric.

Option 3: Acids need electrons to release H^+ ions and non-metals do not donate electrons hence, there is no reaction between a non-metal and an acid.

Option 4: All acids do contain hydrogen. They dissociate in the presence of water to produce H^+ ions.

                                 HCl\overset{H_2O}{\rightarrow} H^++Cl^-

Option 5: Acids do conduct electricity that is they carry electrical charges. This was explained by Arrhenius. He said that the acids dissociate into H^+ions, when it is dissolved in water. These ions hence acts as charge carriers in water.

Flauer [41]3 years ago
7 0

Answer:

taste sour, contain hydrogen, carry electric charges

Explanation:

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Stored energy is described as potential energy
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Coke is an impure form of carbon that is often used in the in-dustrial production of metals from their oxides. if a sample of co
olasank [31]
The reaction equation is:
<span>2CuO(s) + C(s) </span>→ <span>2Cu(s) + CO</span>₂<span>(g)

First, we determine the number of grams present in one ton of copper oxide. This is:
1 ton = 9.09 x 10</span>⁵ g

We convert this into moles by dividing by the molecular mass of copper oxide, which is:
9.09 x 10⁵ / 79.5 = 11,434 moles

Each mole of carbon reduces two moles of copper oxide, so the moles of carbon required are:
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3 years ago
Question 2<br> Describe the energy in coal and the way in which it’s converted to electrical energy.
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3 years ago
Why amino acids are soluble in pH=3 or pH=10 solutions more than it dissolves in pH=7 solutions?
Ray Of Light [21]

Answer:

Solubility is Affected by pH

The pH of an aqueous solution can affect the solubility of the solute. By changing the pH of the solution, you can change the charge state of the solute.

At pH extremes, the amino acid molecules mostly carry a net charge, thus increasing their solubility in polar solvent. At very low or very high pH, the amino acid molecules have increased charge, thus form more salt bonds with water solvent molecules.

An isoelectric point is the pH at which an amino acid exists as its zwitterion. A zwitterion is the dipolar ionic form of an amino acid. ... If the pH is lower (in acidic conditions) than the isoelectric point then the amino acid acts as a base and accepts a proton at the amino group. This gives it a positive change.

An amino acid is usually more soluble in aqueous solvent at pH extremes than it is at a pH near the isolelectric point of the amino acid. (Note that this does not mean that the amino acid is insoluble at a pH near its pI.)

Which of the following statements correctly explains this phenomenon?

(Select all that apply.)

The neutral charge of an amino acid molecule at its isoelectric point will make the molecule hydrophobic.

At pH extremes, the amino acid molecules mostly carry a net charge, thus increasing their solubility in polar solvent.

At very low or very high pH, the amino acid molecules have increased charge, thus form more salt bonds with water solvent molecules.

At pH values far from the isoelectric point, individual amino acid molecules have greater kinetic energy, thus more readily stay in solution.

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8 0
3 years ago
Please select the best answer and click "submit."
vladimir1956 [14]
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The answer is not in the choices. You only use Hvap if you boil water.
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