J17 Help

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AChoudhry_1L
Posts: 55
Joined: Sat Sep 07, 2019 12:17 am

J17 Help

Postby AChoudhry_1L » Wed Nov 27, 2019 9:36 pm

In each of the following salts, either the cation or the anion is a weak acid or a weak base in water. Write the chemical equation
for the proton transfer reaction of this cation or anion with water:

(a) NaC6H5O (b) KClO (c) C5H5NHCl (d) NH4Br

What are the general guidelines for solving this problem and what would the equations be?

Justin Vayakone 1C
Posts: 90
Joined: Sat Sep 07, 2019 12:19 am

Re: J17 Help

Postby Justin Vayakone 1C » Thu Nov 28, 2019 12:06 pm

The problem is asking for equations involving a cation that is a weak acid reacting with water or an anion that is a weak base reacting with water, so they will look something like this: or

The A represents the cation weak acid which donates an H+ to water while B represents the anion weak base receiving an H+ from water. For part a, we have Na+ and C6H5O-. Na+ doesn't react with water and just stays as ions while the anion is our weak base, so our proton transfer equation would be: . For part b, Oxygen is attached to Chlorine, so when this molecule dissociates in water, we'll have K+ that stays as ions and OCl- ions that will react with water: . For part c, C5H5NH+ will be our cation weak acid: . For part d, NH4+ is the cation weak acid: .

A Raab 1K
Posts: 56
Joined: Sat Aug 24, 2019 12:16 am

Re: J17 Help

Postby A Raab 1K » Thu Nov 28, 2019 3:39 pm

How do you know the Cl goes with O instead of with K? (part b)


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