## Test 1

Dustin Shin 2I
Posts: 64
Joined: Fri Sep 28, 2018 12:26 am

### Test 1

For the first test, are there things we should know going into the test that is not given to us? This can range from different formulas to conversions or anything else.

Ava Kjos 1D
Posts: 65
Joined: Fri Sep 28, 2018 12:19 am

### Re: Test 1

Pretty much all of the formulas and conversions are given. You should know the following relationships:

pOH + pH = pKw
[OH][H30] = Kw
(Ka)(Kb) = Kw
pKa + pKb = pKw
PV = nRT

If you know these then you should be good.

Charles Gu 1D
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

### Re: Test 1

The quadratic formula will also be given.

Douglas Nguyen 2J
Posts: 71
Joined: Fri Sep 28, 2018 12:15 am

### Re: Test 1

You can consult the Constants and Equations sheet on Dr. Lavelle's website too! It's pretty handy to use while you do your homework so that you're used to it when taking tests:

https://lavelle.chem.ucla.edu/wp-conten ... ations.pdf

Posts: 63
Joined: Fri Sep 28, 2018 12:19 am

### Re: Test 1

They usually provide all the equations you need to know. I find it best to look at it before the test so you are familiar where everything is.

Mya Majewski 1L
Posts: 89
Joined: Fri Sep 25, 2015 3:00 am

### Re: Test 1

to correct the equation above pOH +pH=14 NOT pkw

Andre_Galenchik_2L
Posts: 69
Joined: Fri Sep 28, 2018 12:23 am

### Re: Test 1

If pOH and pH always add up to 14, is it possible to have a negative pH? What about a pH higher than 14?

Aili Ye 4L
Posts: 58
Joined: Fri Sep 28, 2018 12:16 am

### Re: Test 1

pKw at 25 degrees IS 14.

Elle_Mendelson_2K
Posts: 72
Joined: Fri Sep 28, 2018 12:28 am

### Re: Test 1

While it is possible to have a negative pH or a pH that is above 14, for the purpose of this class, we are only considering phs of 0-14.
Hope this helps.

Lopez_Melissa-Dis4E
Posts: 66
Joined: Fri Sep 28, 2018 12:20 am

### Re: Test 1

You should assume that most equations will be given on the constant/equation sheet.

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