Explain the difference between a homogeneous and a heterogeneous mixture.
Solution 13 E: Matter is generally classified according to (i) physical state (ii) By using its composition Homogeneous matter is uniform and continuous whereas heterogeneous consist of two or more phase having non-uniformity and discontinuity. Pure substance refers to the matter which has distinct set of properties that are common to all other samples to that substance. A mixture consists of two or more substance which has a wide range of properties are depending on the relative amounts of the components present in the mixture. (a) rice pudding, Rice pudding is mixture of cooked rice, milk sugar and salt. Every substance has different properties and composition. That is way rice pudding is heterogeneous mixture. (b) Seawater: Seawater is a mixture of water and salt; both combined together and forms an uniform mixture. So seawater is a homogeneous mixture. (c) magnesium Magnesium is an element and elements are always stay in pure form. That is way magnesium is pure substance. (d) crushed ice crushed ice is a form of ice and ice is solid form of water. So its properties are always continuous and uniform. So crushed ice is a pure substance.