A series of test tubes containing buffer solutions of different pH levels, arranged in a row and labeled with their respective pH values.
Keywords
test,
tube,
buffer,
solution,
ph,
acidity,
chemistry,
laboratory,
experiment,
scale,
neutral,
paper,
spectrum,
science,
liquid,
ion,
rainbow,
beaker,
plastic,
colours,
row,
orange,
pipette,
fluid,
solvent,
opaque,
dropper