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2 years ago

Determine if each statement below is True or False regarding Arrhenius and Br∅nsted-Lowry definitions for acids and bases.

Chemistry

1 answer:

Vlad1618 [11]2 years ago

5 0

Answer:

All statements are true

Explanation:

Arrhenius theory:-

The Arrhenius theory was introduced introduced by Swedish scientist named Svante Arrhenius in 1887.

According to the theory, acids are the substances which dissociate in the aqueous medium to produce electrically charged atoms ( may be molecule). Out of these species furnished, one must be a proton or the hydrogen ion, $H^+$ .

Hence, statement 1 is correct.

Bronsted-Lowry base is the specie which accepts the proton form the medium. For example, Benzoate ion is the conjugate base of the benzoic acid. It is a Bronsted-Lowry base and the dissociation of benzoate ion can be shown as:-

$C_6H_5COO^-_{(aq)} + H_2O_{(l)}\rightleftharpoons C_6H_5COOH_{(aq)} + OH^-_{(aq)}$

Hence, statement 2 is correct.

Acetic acid will dissociate as:-

$CH_3COOH\rightleftharpoons CH_3COO^-+H^+$

Hence, statement 3 is also correct.

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Consider a mixture of 10 billion 02 molecules and 10 billion H2 molecules. In what way is this mixture similar to a sample conta

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Explanation:

Number of oxygen molecules = 10 billion = $10^9$

Number of hydrogen molecules = 10 billion = $10^9$

Number of molecules of hydrogen peroxides = 10 billion = $10^9$

Moles of oxygen gas : $n_{o_2}$

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Moles of hydrogen gas : $n_{H_2}$

$\frac{10^9}{N_A}=\frac{10^9}{6.022\times 10^{23}mol^{-1}}=1.6605\times 10^{-15} mol$

$n_{O_2}=n_{H_2}$

Moles of hydrogen gas : $n_{H_2O_2}$

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$n_{O_2}=n_{H_2}-n_{H_2O_2}$

Number of moles in hydrogen gas, oxygen gas and hydrogen peroxide is same.

Total number of atoms in $10^6$ molecules of oxygen:

$2\times 10^6$ (2 atoms in 1 molecule)

Total number of atoms in $10^6$ molecules of hydroegn :

$2\times 10^6$ (2 atoms in 1 molecule)

Total number of atoms in $10^6$ molecules of hydrogen peroxide:

$4\times 10^6$ (4 atoms in 1 molecule)

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