## pH sig figs

Andie Jian 1D
Posts: 69
Joined: Fri Sep 28, 2018 12:17 am
Been upvoted: 1 time

### pH sig figs

In the textbook, it says that the number of sig figs AFTER the decimal in the pH value should equal the sig figs of the molarity. However, many of the solutions don't seem to follow this rule. Should we just base sig figs in our pH normally, or follow this decimal rule?

Rhea Churi 4K
Posts: 62
Joined: Fri Sep 28, 2018 12:28 am

### Re: pH sig figs

My TA said to follow the decimal rule. Count sig figs after the decimal.

Megan Wong 4E
Posts: 32
Joined: Fri Sep 28, 2018 12:28 am

### Re: pH sig figs

I went to a review session and the UA said sig figs for pH pertains to numbers after the decimal.

For example, a pH of 5.435 has 3 sig figs.

Daniel Chang 3I
Posts: 33
Joined: Fri Sep 28, 2018 12:23 am

### Re: pH sig figs

pH sig figs are different. You have to count after the decimal places and see how many to include based on the given problem

Kyither Min 2K
Posts: 60
Joined: Wed Oct 03, 2018 12:15 am

### Re: pH sig figs

On Dr.Lavelle's sig fig worksheet, he said to count the sig figs after the decimal for pH, so I suggest you go with that.

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