A substance or material that contains only one kind of compound or one element can be defined as homogeneous. Homogeneous is Latin for "the same kind".
An example of a homogeneous substance would be pure water, which contains only the compound H2O or pure table salt that contains only the compound NaCl. Two or more gases will always mix to form just one phase.
Definition of Homogeneous Catalyst: A catalyst that exists in the same phase as the reactants and products - usually liquid phase reactions, sometimes gas phase.
Definition of Homogeneous Equilibrium: A reaction equilibrium in which the substances are all in the same phase.
Definition of Homogeneous Mixture: A mixture which has uniform composition and properties throughout. For example, a teaspoonful of table salt stirred into a glass of water will form a homogeneous mixture. A teaspoonful of sand in water will form a mixture but it won't be homogeneous.
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