## pH sig figs

Deena Doan 2F
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

### pH sig figs

Do sig figs only count after the decimal when it comes to pH?

Annika Zhang 1F
Posts: 49
Joined: Sat Jul 20, 2019 12:15 am

### Re: pH sig figs

most of the time sig figs for pH only go to one decimal place after the whole number

Rachel Yu 1G
Posts: 113
Joined: Fri Aug 09, 2019 12:15 am

### Re: pH sig figs

Yes, the sig fig is equal to the # of numbers after the decimal for pH.

J Medina 2I
Posts: 102
Joined: Wed Sep 25, 2019 12:17 am

### Re: pH sig figs

Does this work the other way around too? If we were given a H3O+ concentration of 1.56 x 10^-4 where there are 3 sig figs, would we have to write the pH as 3.807 or as 3.81 ?

Yiyang Jen Wang 4G
Posts: 76
Joined: Wed Nov 21, 2018 12:18 am

### Re: pH sig figs

Yes for PH sic figs count after the decimal

ATingin_3I
Posts: 51
Joined: Fri Aug 30, 2019 12:17 am

### Re: pH sig figs

I thought sig figs for pH were equal to the exponent?

Kylie Lim 4G
Posts: 110
Joined: Sat Aug 17, 2019 12:15 am

### Re: pH sig figs

During one of the review sessions they said that sig figs for pH count after the decimal so 12.22 has 2 sig figs.

Joanne Lee 1J
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

### Re: pH sig figs

Yes, for pH sig figs, only the values after the decimal place count.

Akshay Chellappa 1H
Posts: 59
Joined: Wed Sep 11, 2019 12:15 am

### Re: pH sig figs

Yes

Annie Ye
Posts: 106
Joined: Wed Sep 18, 2019 12:22 am

### Re: pH sig figs

Yes, for pH you count after the decimal.

605357751
Posts: 31
Joined: Wed Sep 18, 2019 12:20 am

### Re: pH sig figs

I believe you count two points are the decimal.

Angelo Mapalo 4E
Posts: 50
Joined: Sat Aug 24, 2019 12:18 am

### Re: pH sig figs

You count the sig figs after the decimal point when calculating with logs.

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