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# Acids Bases

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## Visualizing acids and bases

### neutral ph            basic pH              acidic pH

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## How is that? The pH scale is based on powers of ten.

### So there are 10 times the number of H+ ions.

“When Should I Use Logarithmic Scales in my Charts and Graphs?”

MathBench Biology Modules – “Data for scaling studies are almost always displayed and analyzed using log-transformed data. We are going to show you why and how – and make sure you are comfortable looking at these kinds of data and graphs. To do this, we are going to use our full data set of 600 mammals, and you will see why it is easier to see and analyze patterns in the data. In fact, you can see it just by looking at this picture!”
http://mathbench.umd.edu/modules/misc_scaling/page07.htm

## Ph and equlibrium

https://kaiserscience.wordpress.com/2018/05/22/ph-and-equilibrium/

## Learning Standards

2016 Massachusetts Science and Technology/Engineering Curriculum Framework

HS-PS1-9 (MA). Relate the strength of an aqueous acidic or basic solution to the extent of an acid or base reacting with water, as measured by the hydronium ion concentration (pH) of the solution. Make arguments about the relative strengths of two acids or bases with similar structure and composition.

Science and Engineering Practices

Mathematical and computational thinking in 9–12 builds on pre-K–8 and experiences and progresses to using algebraic thinking and analysis, a range of linear and nonlinear functions including trigonometric functions, exponentials and logarithms, and computational tools for statistical analysis to analyze, represent, and model data.

Benchmarks for Science Literacy, AAAS

Most cells function best within a narrow range of temperature and acidity. At very low temperatures, reaction rates are too slow. High temperatures and/or extremes of acidity can irreversibly change the structure of most protein molecules. Even small changes in acidity can alter the molecules and how they interact. 5C/H7

The temperature and acidity of a solution influence reaction rates. Many substances dissolve in water, which may greatly facilitate reactions between them. 4D/M4

## ACS Middle School Chemistry Lessons

###### From middleschoolchemistry.com, contact staff at ACS. Copyright 2015 American Chemical Society

Online textbook: Chapter 5: Acids Bases and their reactions

http://www.chem4kids.com/files/react_acidbase.html

http://www.chemistryland.com/CHM151S/04-Solutions/acids/AcidsBases151.html