Science Enhanced S&S Biology

investigate the pH of various water sources and solutions; recognize that the pH of pure water is 7, but that various substances can lower or raise the pH. A solution with pH below 7 is acidic. ... In a separate space away from possible contamination, put 100-200 mL of water in a sandwich bag. 4. Add 5–10 mL of the starch suspension. Squeeze ... ................
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