Before beginning this experiment in the laboratory, you should be able to answer

Question

Before beginning this experiment in the laboratory, you should be able to answer the following questions. Classify each of the following as a pure substance or a mixture; if it is a mixture, state whether it is heterogeneous or homogeneous; (a) concrete, (b) tomato juice, (c) marble, (d) seawater, and (e) iron Suggest a way to determine whether a colorless liquid is pure water or a salt solution without tasting it. What distinguishes a mixture from an impure substance? Define the process of sublimation. How do decantation and filtration differ? Which should be faster?

Explanation / Answer

Hi,

1)Pure substances are defined as substances that are made of only one type of atom or only one type of molecule.
Homogeneous Mixture: A mixture which has uniform composition and properties throughout
Heterogeneous mixture is made of different substances that remain physically separate

The list of items given are classified as:-

Concrete: heterogeneous mixture,
Tomato juice: Pure substance,
Marble:heterogeneous mixture,
Seawater: homogeneous mixture,
Iron: pure substance

2)There are many ways one way is boil both of the pure water will boil earlier than salted water

Thank you

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