Acid & alkali's are easy to understand. Here are some words to learn: Like so.
Acid,Neutral,Alkali.
red,green,yellow,blue,purple
easy!!!
red and orange is a acid
green and yellow is an neutral
purple and Blue is an alkali
all the others are inbetween,
remember this starts from (PH1-PH16)
Because each colour has a PH number.