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There are several ways to test pH – Blue litmus paper red = acid – Red litmus paper blue = basic – pH paper multi-colored – pH meter 7 is neutral, 7 base. - ppt download
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A modern digital pH meter next to a box of paper pH strips. pH measuring. Translation right box: "100 test strips. pH-indicatorstrips, not bleeding Stock Photo - Alamy
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Alternatives for measuring solution pH are a pH meter, a pH test kit,... | Download Scientific Diagram
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