Soil Ph Levels! Pls Help! (1 Viewer)

[Kuya]

ok so you know when you measure soil PH levels.. what do you add. is it just universal indicator? or is there something else in addition?

 

[xiao1985]

you can just add universal indicator unless the question specify you to do it in some particular way...

like, use of a natural indicator or something...

 

[frodo]

or u can use an electric one where you just place to probes into the soil?

 

[t-i-m-m-y]

or do a acid-base titration

kuya: theres heaps of ways. what equipment do u have access to?

 

[elizabethy]

i think u do add barium or stuff....i don't exactly remember....but when adding a universal indicator some barium compound is added.....i can't remember the name !

 

[CM_Tutor]

I think the barium compound you are thinking of is barium sulfate - the idea is that it absorbs the Universal Indicator, so it's easier to see the colour.

 

[t-i-m-m-y]

barium sulfate is that white precipitate yeah?

 

[CM_Tutor]

Yes, barium sulfate is white.