Nicole Hancock November 2, 2016 High School Set 2 Total Hardness Analysis Instructions for High School in PowerPoint and Video Format Nicole Hancock November 2, 2016 High School Set 2 Download the PowerPoint for High School Total Hardness Analysis Instructional Video: Purpose: To determine the total hardness concentration in drinking water from 4 different sources, plus a Saskatchewan Guideline Limit Sample (SGLS) for quality control purposes.