## Acids and Basis: Salts

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briannam_1F
Posts: 35
Joined: Wed Sep 18, 2019 12:18 am

### Acids and Basis: Salts

How does one calculate the pH of a weak acid and its salt?

Minh Ngo 4G
Posts: 137
Joined: Thu Jul 25, 2019 12:17 am

### Re: Acids and Basis: Salts

That's the ICE table problem!

Venus_Hagan 2L
Posts: 104
Joined: Fri Aug 02, 2019 12:16 am

### Re: Acids and Basis: Salts

most of the time when you are dealing with weak acids and bases, you will be using an ICE table

WesleyWu_1C
Posts: 117
Joined: Thu Jul 25, 2019 12:16 am

### Re: Acids and Basis: Salts

You would have to use an ice table and find the concentration of H3O+ (sometimes you will have to used the quadratic equation to find it). Then you plug in the concentration of H3O+ to get the pH.

005384106
Posts: 101
Joined: Sat Aug 24, 2019 12:16 am

### Re: Acids and Basis: Salts

When using an ICE Table, can you ever have a starting value of products, or is it always 0?

William Chan 1D
Posts: 102
Joined: Sat Sep 14, 2019 12:15 am

### Re: Acids and Basis: Salts

You can use an ICE table to help you figure out the concentrations in terms of known concentrations and changes in concentrations (usually determined in terms of 'x'). Depending on the size of k (if k is larger), then you may have to use the quadratic formula to solve for x. If the change in concentration is small, it can be ignored.

Leonardo Le Merle 1D
Posts: 56
Joined: Wed Feb 27, 2019 12:16 am

### Re: Acids and Basis: Salts

It's a good idea to memorize which bases and acids are strong so you can know exactly when to apply the above methods mentioned.

Tanmay Singhal 1H
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Joined: Sat Jul 20, 2019 12:16 am

### Re: Acids and Basis: Salts

you have to use the ICE table

Myka G 1l
Posts: 100
Joined: Fri Aug 30, 2019 12:17 am

### Re: Acids and Basis: Salts

005384106 wrote:When using an ICE Table, can you ever have a starting value of products, or is it always 0?

Sometimes you will have a starting value of products and you’ll have to add x to the value in the ice table, creating a more complex equation that is equal to k. Also don’t forget coefficients in the ice table!

Philip
Posts: 100
Joined: Sat Sep 07, 2019 12:16 am

### Re: Acids and Basis: Salts

Use an ice table and any available information like the pKa or pKb as well as any equilibrium constants would be needed to solve such a problem