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2 years ago

Which of the following compounds is an Arrhenius base in water?

2 answers:

8 0

Arrhenius model considers a base a compound that produces OH(-)

H2SO4 produces H(+) and is an acid

C6H12O6 is an organic product, sugar, that does not produce OH(-)

HOClO2 = HClO3, which produces H(+) and is an acid

NH3 is believed to ionize in water and produce NH4(+) and OH(-).

As per this the answer is NH3.

Nevertheless, NH3 is not a good example of bases as per Arrhenius model, because it is not so evident that NH3 produces OH(-).

iogann1982 [59]2 years ago

3 0

Sodium hydroxide (NaOH) is an Arrhenius base, as NaOH is an ionic compound that dissociates into Na + and OH− ions when dissolved in water.

<h2>Further explanation </h2>

Acids and bases are two classes of chemicals that are very commonly found around us. For example, vinegar, citric acid, and acid in the stomach are classified as acid, while whiting and soda are classified as basic. Acids and bases have different properties. At first, acids and bases are distinguished by taste, where acids are sour while bases are bitter and slippery like soap. However, in general, acidic and basic substances are corrosive and toxic, especially in the form of high levels of the solution so that it is very dangerous if tested for its nature by the method of feeling it.

According to Arrhenius's theory, acids are defined as compounds that if dissociated in an aqueous solution liberate H + (hydrogen ions). A base is defined as a compound that dissociates in an aqueous solution liberating OH− (hydroxide ions).

Arrhenius Acid-Base Theory

This theory was first put forward in 1884 by Svante August Arrhenius. According to Arrhenius, the definitions of acids and bases, namely:

acid is a compound that dissolves in water releasing H + ions.
A base is a compound which, when dissolved in water, releases OH− ions.

Hydrochloric acid (HCl) which is very soluble in water is classified as Arrhenius acid, as HCl can decompose into H + and Cl− ions in water. Unlike the case with methane (CH4) which is not Arrhenius acid because it cannot produce H + ions in water even though it has H. Sodium hydroxide (NaOH) including Arrhenius bases, as NaOH is an ionic compound which dissociates into Na + and OH− ions when dissolved in water. The concept of Arrhenius acids and bases is limited to the condition of water as a solvent.

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acid and base theory brainly.com/question/2456608

Arrhenius theory brainly.com/question/2456608

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Class: high school

Subjects: Chemistry

Keywords: acids, bases, Arrhenius

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Explanation:

An oxidizing accepts an electron and becomes reduced while a reducing agent loses an electron and become oxidized.

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2 years ago

Given these reactions, where X represents a generic metal or metalloid 1) H2(g)+12O2(g)⟶H2O(g)ΔH1=−241.8 kJ 1) H2(g)+12O2(g)⟶H2O

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Answer:

ΔH = -793,6 kJ

Explanation:

It is possible to obtain ΔH of this reaction using Hess's law that says you can sum the half-reactions ΔH to obtain the ΔH of the global reaction:

If half-reactions are:

1) H₂(g) + ¹/₂O₂(g) ⟶ H₂O(g) ΔH₁ = −241.8 kJ

2) X(s) + 2Cl₂(g) ⟶ XCl₄(s) ΔH₂ = +356.9 kJ

3) ¹/₂H₂(g) + ¹/₂Cl₂(g) ⟶ HCl(g) ΔH₃ = −92.3 kJ

4) X(s) + O₂(g) ⟶ XO₂(s) ΔH₄ = −639.1 kJ

5) H₂O(g) ⟶ H₂O(l) ΔH₅ = −44.0 kJ

The sum of (4) + 4×(3) - (2) - 2×(1) - 2×(5) is:

(4) X(s) + O₂(g) ⟶ XO₂(s) ΔH = −639.1 kJ

+4×(3) 2H₂(g) + 2Cl₂(g) ⟶ 4HCl(g) ΔH = −369,2 kJ

-(2) XCl₄(s) ⟶ X(s) + 2Cl₂(g) ΔH = -356,9 kJ

-2×(1) 2H₂O(g) ⟶ 2H₂(g) + O₂(g) ΔH = +483,6 kJ

-2×(5) 2H₂O(l) ⟶ 2H₂O(g) ΔH = +88.0 kJ

= XCl₄(s) + 2H₂O(l) ⟶ XO₂(s) + 4HCl(g)

Where ΔH is:

ΔH = -639,1 kJ -369,2 kJ -356,9 kJ +483,6 kJ +88,0 kJ

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I hope it helps!

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2 years ago

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Jet001 [13]

Answer:

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Explanation:

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Organic compounds (like CH₄) undergo combustion forming water and CO₂.

The combustion reaction of CH₄ is:

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Hence, the first equation from the choices is not showing the combustion reaction of CH₄.

Not only organic compounds can undergo combustion. Metals and no metals can undergo combustion, i.e. metals and no metals can react with oxygen releasing light or heat.

The reaction of copper and oxygen (second choice) is a combustion reaction:

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The formation of water (2H₂ + O₂ → 2H₂O) is other example of a combustion reaction where no organic compounds are involved.

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