Table of Contents
- 1 Can particles of homogeneous mixture be seen with a microscope?
- 2 How can you identify a substance or a mixture?
- 3 Can a solution be seen under a microscope?
- 4 How do scientific tests help determine the properties of substances?
- 5 Which is the best description of a mixture?
- 6 Which is the correct description of a heterogeneous mixture?
Can particles of homogeneous mixture be seen with a microscope?
The composition of a mixture cannot be seen even under a powerful microscope.
How can you identify a substance or a mixture?
Pure substances and mixtures
- a pure substance consists only of one element or one compound.
- a mixture consists of two or more different substances, not chemically joined together.
When viewed under a microscope small particles are visible in the mixture?
When viewed under a microscope, small particles are visible in the mixture. Colloid because the particles are slightly larger than those of a solution. A beam of light passed through the mixture is scattered.
Can you see the particles in a mixture?
Mixtures have different properties depending on the size of their particles. The particles are too small to see and also too small to settle or be filtered out of the mixture. When the salt is thoroughly mixed into the water in this glass, it will form a solution.
Can a solution be seen under a microscope?
A true solution contains small solute particles molecules or ions dispersed throughout solvent the particles are invisible even under a microscope a suspensino contains very much larger insoludle particles which may be visible to naked eye and certainly visible under a microscope.
How do scientific tests help determine the properties of substances?
The chemical properties of a substance can be determined by performing experiments that use specific materials or processes with known characteristics. If a material affects the substance in a given way, the substance has a particular property. If a process changes the substance, more properties can be deduced.
How did you distinguish if the given sample is a mixture or a substance?
If it is pure, the substance is either an element or a compound. If a substance can be separated into its elements, it is a compound. If a substance is not chemically pure, it is either a heterogeneous mixture or a homogeneous mixture. If its composition is uniform throughout, it is a homogeneous mixture.
What does a mixture look like in science?
Mixtures are classified based on how uniform they are and on the particle size of components relative to each other. Homogeneous mixtures have a uniform composition and phase throughout their volume, while heterogeneous mixtures do not appear uniform and may consist of different phases (e.g., liquid and gas).
Which is the best description of a mixture?
Impure Substances: All mixtures are viewed as impure substances. What is a Mixture? Mixtures are the substances composed of two or more forms of matter. You can separate them by physical methods.
Which is the correct description of a heterogeneous mixture?
A heterogeneous mixture consists of two or more phases. When oil and water are combined, they do not mix evenly, but instead form two separate layers. Each of the layers is called a phase. Identify each substance as a compound, an element, a heterogeneous mixture, or a homogeneous mixture (solution).
How to classify a substance according to its composition?
Identify each substance as a compound, an element, a heterogeneous mixture, or a homogeneous mixture (solution). Decide whether a substance is chemically pure. If it is pure, the substance is either an element or a compound. If a substance can be separated into its elements, it is a compound.
What happens to a mixture when it is dissolved in water?
A mixture is a physical blend of two or more components, each of which retains its own identity and properties in the mixture. Only the form of the salt is changed when it is dissolved into water. It retains its composition and properties.