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seropon [69]
3 years ago
5

Which of the following statements is not true regarding acids? (3 points)

Chemistry
2 answers:
horsena [70]3 years ago
8 0

Answer:

Lewis acid is a substance that donates a lone-pair of electrons.

Explanation:

What is said in the statement corresponds to a Lewis base, not an acid. For example, NH3 is a Lewis base, since it is capable of donating its pair of electrons. Trimethylborane (Me3B) is a Lewis acid, since it is capable of accepting a solitary pair.

Andrei [34K]3 years ago
3 0

Answer : The incorrect statement is, Lewis acid is a substance that donates a lone-pair of electrons.

Explanation :

According to the Arrhenius theory, an acid is a substance that ionizes in the water to give hydronium ion (H_3O^+) or hydrogen ion (H^+) and a bases is a substance that ionizes in the water to give hydroxide ion (OH^-).

According to the Bronsted Lowry concept, Bronsted Lowry-acid is a substance that donates one or more hydrogen ion in a reaction and Bronsted Lowry-base is a substance that accepts one or more hydrogen ion in a reaction.

According to the Lewis acid-base theory, an acid is a substance that accepts pairs of electrons and the a base is a substance that donates pairs of electrons.

The pH of an acid is always less than 7.

Hence, the incorrect statement is, Lewis acid is a substance that donates a lone-pair of electrons.

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Explanation:

The formula for the calculation of the average atomic mass is:

Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})

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Since the element has only 2 isotopes, so the let the percentage of first be x and the second is 100 -x.

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Given, Average Mass = 151.96 amu

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