From Blue to Pink. If you have acidic soil—meaning your soil's pH is under 6.0—and you would like to change your hydrangeas from blue to pink, add garden lime, which is found at most local ...

Pink. 4. Ask students: ... Note: The differences in color on the base side of the pH scale for universal indicator are not as obvious as those on the acid side. Students will have to look harder to ...

The pH scale is used to classify the level of acidity a basicity of a substance. The scale is numbered from zero through to 14, and on modern scales each number has a corresponding color on a ...