The information below is used for the next three questions
Indicator paper used to test the pH of some soils had these colours.
3 Pale red
9 Pale green
I know when you are measuring liquid that yellow is for acid, but what would the colour yellow indicate for a soil pH?
for acids: 0 < pH < 7
for bases: 7 < pH <or= 14
for nuetral substances: pH = 7
there are some substances with pH greater than 14, but these are VERY rare, so most textbooks don't even consider them. as far as you are concerned, the highest pH possible is 14. the closer we are to 14 the stronger the base, the closer we are to 0, the stronger the acid, and nuetral is 7