How do you guess what pH a point of equilibrium will be , for example tartaric acid and NaOH, or NaOH and HCl given just the formula. do you need to know the strengths (weak / strong)
this is how you then chose an indicator but what is the point in an indicator if you can use a pH meter? (except for in non aqueous solotions)
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2007-03-04 11:52:21 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
If you know the strengths of the solutions you can work out the pKa or pKb which tells you the conc. of H+ or OH- in the solution so you can work out the pH of the equilibrated solution. Indicators are good if you know the rough pH range but aren't sure of the exact pH or if you don't a pH meter!
2007-03-04 11:58:40 · answer #1 · answered by cahilld11 1 · 0⤊ 0⤋
The strengths will tell you the rough end point. Looking at data can tell you what indicator to use. And indicators are used when the exact point of equilibrium is unknown. a pH meter may then be used to find the value
2007-03-05 11:59:10 · answer #2 · answered by SS4 7 · 0⤊ 0⤋
use of an organic indication like polyphenol will tell the acidity of the solution. If you are using NaOH and HCL (classic titration, ahh, I miss those labs), the indicator will react and change color at the point of acidity it is designed to identify. You do need to know the strengths or molality of the reactants.
2007-03-04 22:57:21 · answer #3 · answered by adamstivala 2 · 0⤊ 0⤋
lmao if u titrate it completely how will there be equibilibrium. equilibrium is for weak base and weak acid where there will be no end point...
2007-03-05 08:50:42 · answer #4 · answered by gauravragtah 4 · 0⤊ 0⤋