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4 years ago

A substance that can donate a pair of electrons to form a covalent bond is known as a(n) _____ base.

Chemistry

2 answers:

DENIUS [597]4 years ago

6 0

Answer : A substance that can donate a pair of electrons to form a covalent bond is known as a(n) Lewis-base.

Explanation :

According to the Lewis acid-base theory,

Lewis acid : It is a substance that can accepts pairs of electrons to form a covalent bond.

Lewis-base : It is a substance that can donates pairs of electrons to form a covalent bond.

For example :

$H^++OH^-\rightarrow H_2O$

In this reaction, $H^+$ ion is Lewis-acid and $OH^-$ ion is a Lewis-base. The $OH^-$ ion donates electrons to $H^+$ ion to form $H_2O$ .

Hence, a substance that can donate a pair of electrons to form a covalent bond is known as a(n) Lewis-base.

Gnesinka [82]4 years ago

5 0

A substance that can donate a pair of electrons to form a covalent bond is known as a Lewis base. It is any substance that can donate a pair of nonbonding electrons. The Lewis theory suggests that acids react with bases to share a pair of electrons with no change of oxidation numbers of any atoms.

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3 years ago

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Answer:

See explanation

Explanation:

Full molecular equation;

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Full ionic equation

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Net ionic equation;

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3 years ago

At a certain temperature the rate of this reaction is first order in SO₃ with a rate constant of 0.208 s⁻¹:

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Answer:

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Explanation:

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

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t = 7.30 seconds

So,

$[A_t]=1.36\times e^{-0.208\times 7.30}\ M=0.30\ M$

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