C401Ch15LN2 - Chapter 15: Acids & Bases and Aqueous...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 15: Acids & Bases and Aqueous Equilibrium Part 2 pH Scale (a logarithmic scale) We have all heard of the proper pH of swimming pools or the normal pH of blood (or shampoo being pH adjusted), but what does it really mean? The pH scale is just a way of telling us how acidic (or basic) a solution is. The “p” stands for “the negative log of”, while the H stands for [H + ] So pH means the negative log of the hydronium ion concentration. Question: what is the pH of a sln with [H + ] = 6.67x10 -6 ? Take-Home Question : what is the pH of a sln with [H + ] = 1x10 -8 ? Sig Fig note for pH: When you take the pH of a [H + ] concentration, count how many sig figs are in the concentration, then you carry this many places after the decimal in your final pH. Example: If the [H + ] = 1.0x10 -3 , then the pH is 3.00. This is because there are 2 sig figs in the concentration. The 3 just reflects the power of ten so it doesn’t count for sig fig purposes.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/25/2008 for the course CHEM 400-401 taught by Professor Dr.samples during the Fall '06 term at American River.

Page1 / 4

C401Ch15LN2 - Chapter 15: Acids & Bases and Aqueous...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online