I know that potassium hydroxide is a colourless solution but i am not sure if it is homogenous and i dont know if it is a pure substance?
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Solid potassium hydroxide, KOH, is a pure substance, a compound.
"Homogeneous" and "heterogeneous" refer to mixtures, which are not pure substances. If KOH is dissolved in water, then a homogeneous (uniform) mixture is produced. Solutions are homogeneous mixtures.
"Homogeneous" and "heterogeneous" refer to mixtures, which are not pure substances. If KOH is dissolved in water, then a homogeneous (uniform) mixture is produced. Solutions are homogeneous mixtures.
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Potassium hydroxide is an ionic compound of Potassium and Hydroxide and when it's in pure form it's a solid just like all ionic compounds so when it's in solution it's not in it's pure form but a solution would count as a homogeneous mixture.
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Pisgahchemist has it right.