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3 years ago

What is the difference between an acid and its conjugate base?

Chemistry

2 answers:

Dafna1 [17]3 years ago

3 0

Answer : The correct option is B: The acid donates an H + ion.

Explanation :

According to Bronsted -Lowry theory, an acid is a substance that donates a proton. The substance that is left after the proton is donated is known as "conjugate base" of that acid.

Consider a general acid HA. The dissociation reaction of the acid can be written as follows.

$HA (aq) + H_{2}O (l)\rightleftharpoons H_{3}O^{+} (aq)+ A^{-}(aq)$

In the above example, HA behaves as an acid because it donates proton to H₂O. When the proton is donated, A⁻is formed on the product side which is a conjugate base of HA.

From above discussion, we can say that a substance and its conjugate differ by a proton, H⁺ only.

Therefore the acid donates an H + ion is the correct option.

Romashka [77]3 years ago

3 0

I took a quiz with this question on it, the answer is
B) The acid donates an H + ion

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Part A

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These are two questions and two answers

Question 1.

Answer:

7.33 × 10 ⁻³ c

Explanation:

1) Data:

a) m = 9.11 × 10⁻³¹ kg

b) λ = 3.31 × 10⁻¹⁰ m

c) c = 3.00 10⁸ m/s

d) s = ?

2) Formula:

The wavelength (λ), the speed (s), and the mass (m) of the particles are reltated by the Einstein-Planck's equation:

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3) Solution:

Solve for s:

s = h / (m.λ)

Substitute:

s = 6.626×10⁻³⁴J.s / ( 9.11 × 10⁻³¹ kg × 3.31 × 10⁻¹⁰ m) = 2.20 × 10 ⁶ m/s

To express the speed relative to the speed of light, divide by c = 3.00 10⁸ m/s

s = 2.20 × 10 ⁶ m/s / 3.00 10⁸ m/s = 7.33 × 10 ⁻³

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Question 2.

Answer:

2.06 × 10 ⁻³⁴ m.

Explanation:

1) Data:

a) m = 45.9 g (0.0459 kg)

b) s = 70.0 m/s

b) λ = ?

2) Formula:

Macroscopic matter follows the same Einstein-Planck's equation, but the wavelength is so small that cannot be detected:

λ = h / (m.s)

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3) Solution:

λ = h / (m.s)

Substitute:

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Answer: 2.06 × 10 ⁻³⁴ m.

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