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Help, please!

Which property of a substance can be determined using a pH indicator ?

Density
Acidity
Electrical Conductivity
Thermal Conductivity
Boiling Point

Help please Which property of a substance can be determined using a pH indicator Density Acidity Electrical Conductivity Thermal Conductivity Boiling Point class=

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Amnda
The answer is acidity, because pH indicators help indicate the H+ or OH- concentration in a solution. H+ concentrations create acids, and OH- make bases. pH indicators don’t indicate any of the other answers in the question, so the answer is Acidity.