Chemistry, 17.01.2020 07:31 adam15200031

Select all that apply.
consider this system: ch3cooh(aq) h+(aq) + ch3coo- ka = 1.8 x 10-5
what will happen to the equilibrium as oh- ions are added?

a) h+ will combine with oh- to form water.
b) [ch3cooh] will increase.
c) the acid will dissociate to supply more h+.
d) the reaction will move to the right.
e) the reaction will move to the left.

Answers: 3

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Answers

Consider this system: CH3COOH(aq) H+(aq) + CH3COO- Ka = 1.8 x 10-5
The equilibrium as OH- ions are added;

A) H+ will combine with OH- to form water.

C) The acid will dissociate to supply more H+.
D) The reaction will move to the right.

Answer from: gen73

Answer : The correct options are, (A), (C) and (D)

Explanation :

Le-Chatelier's principle : It states that if any change in the variables of the reaction, then the equilibrium will shift in that direction where the effect will be minimum.

The balanced equilibrium reaction will be,

$CH_3COOH(aq)\rightleftharpoons H^+(aq)+CH_3COO^-$

As the concentration of H^+ are decreased, the equilibrium will shift in a direction where concentration of H^+ is increasing and thus the dissociation of acid will increase to supply more of ions. During this process the reaction will move to the right direction.

In the given equilibrium reaction when the OH^- are added then the H^+ ion will combine with OH^- ion to form water.

Hence, the correct options are, (A), (C) and (D)

Answer from: Quest

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

$^{m}_{4}x$ and $^{m}_4y$

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

$^{m}_{5}x^{-}$

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be $^{9}_{5}be^{-}$ and $^{9}_{4}be$ .

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.

Answer from: Quest

They can measure the amount of energy gained or lost

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Select all that apply.
consider this system: ch3cooh(aq) h+(aq) + ch3coo- ka = 1.8 x 10-5

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