Chapter 12 Question 1

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Karla_Coronado_1J
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Joined: Wed Sep 21, 2016 3:00 pm

Chapter 12 Question 1

Postby Karla_Coronado_1J » Sun Nov 20, 2016 10:12 pm

Write the formulas for the conjugate acids of
(a) CH3NH2, methylamine;
(b) NH2NH2, hydrazine;
(c) HCO3-;
and the conjugate bases of
(d) HCO3-;
(e) C6H5OH, phenol;
(f) CH3COOH.

How would I go about answering this?

Thanks in advance!

Geoffrey Zhang 3I
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Joined: Wed Sep 21, 2016 3:00 pm

Re: Chapter 12 Question 1

Postby Geoffrey Zhang 3I » Mon Nov 21, 2016 12:27 am

A conjugate acid is the acid formed when a base accepts a proton.
A conjugate base is the base formed when an acid donates a proton.

So to find conjugate acids, add a proton or H+ to the molecule
For a) CH3NH2 becomes CH3NH3+

To find conjugate bases, take away a proton
HCO3- becomes CO3 2- charge

Palmquist_Sierra_2N
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Re: Chapter 12 Question 1

Postby Palmquist_Sierra_2N » Mon Nov 21, 2016 11:51 am

For part c) would it just become HCO3, or it would it have a plus sign? Since it starts with a -

Manpreet Singh 1N
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Re: Chapter 12 Question 1

Postby Manpreet Singh 1N » Mon Nov 21, 2016 12:47 pm

Hello,

Since acids are proton acceptors, it would gain a proton. Since it is negatively charged to begin with, adding a H+ would neutralize it. So the answer would be H2CO3

Hope this helps :)


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