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Published on Apr 8, 2013 Last week, Hank talked about how stuff mixes together in solutions. Today, and for the next few weeks, he will talk about the actual reactions happening in those solutions - atoms reorganizing themselves to create whole new substances in the processes that make our world the one we know and love. This week, we focus on acids and bases and their proton-exchanging ways.

Published on May 1, 2013 Paul Andersen explains pH as the power of hydrogen. He explains how increases in the hydronium ion (or hydrogen ion) concentration can lower the pH and create acids. He also explains how the reverse is true. An analysis of a strong acid and strong base is also included.

ACS Lab: In this activity, students will use the color changes of red cabbage indicator to classify substances as either acid or base.

This is the second of four units on materials for Grade 8. This is one of many units in Grades 7 and 8 that explore patterns in chemical reactivity and provide the necessary background knowledge for the understanding of the theoretical basis of chemistry that is introduced in Unit 9M.1 ‘Atomic and molecular structure’. The unit is designed to guide your planning and teaching of lessons on materials. It provides a link between the standards for science and your lesson plans.

Washington Post January 24, 2016

Published on Jan 21, 2016 Flint, Michigan, tried to save money on water. Now its children have lead poisoning. Joe Posner explains. For much more on Flint's water crisis: http://www.vox.com/energy-and-environ...

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In this activity students will conduct research then test the effects of adding products to soil. Students will learn about soil pH, what factors affect the pH of soil and how important it is to the growth of plants. Students will learn to use reputable resources to support their findings. Students will be expected to write a detailed lab report that thoroughly explores the concept while integrating the data from their investigation.

Published on Aug 20, 2015 According to the U.S. Environmental Protection Agency (EPA), “Although the main sources of exposure to lead are ingesting paint chips and inhaling dust, EPA estimates that 20 percent or more of human exposure to lead may come from lead in drinking water. Infants who consume mostly mixed formula can receive 40 to 60 percent of their exposure to lead from drinking water.” Lead is a toxic metal that was used for many years in products found in and around homes and othe

ACS Lab: In this activity, students will use their knowledge of color changes with red cabbage indicator to neutralize an acidic solution with a base and then neutralize a basic solution with an acid.

Soil pH or soil reaction is an indication of the acidity or alkalinity of soil and is measured in pH units. Soil pH is defined as the negative logarithm of the hydrogen ion concentration. The pH scale goes from 0 to 14 with pH 7 as the neutral point. As the amount of hydrogen ions in the soil increases the soil pH decreases thus becoming more acidic. From pH 7 to 0 the soil is increasingly more acidic and from pH 7 to 14 the soil is increasingly more alkaline or basic.