acid
acidic
alkali
alkaline
analysis
balance
base
basic
blue
chart
chemical
chemistry
color
concentration
control
detergent
diet
graph
hydronium
icon
indicator
ion
liquid
litmus
measure
measurement
medical
medicine
meter
neutral
number
paper
ph
reaction
red
result
scale
science
soap
soil
solution
spectrum
strip
system
test
universal
value
water