2. State two characteristics each of a (a) mixture
(b) compound
3. Write two important properties of
(a) metals (b) non-metals
4. Define the following terms :
(a) sedimentation
(b) filtration
(c) evaporation
(d) sublimation
5. Describe how you will be able to separate
common salt from a mixture of ammonium chlo-
ride and common salt.
Please answer this as fast as possible
Answers
Answer:
2.(a)A mixture is the blending of two or more dissimilar substances. A major characteristic of mixtures is that the materials do not chemically combine. Mixtures can be divided.
(b)1. Components in a compound are present in a definite proportion.
2. It has a homogeneous composition.
3. Particles in a compound are of one kind.
4. A compound is made up of one or more atoms of the same or different elements.
5. In a compound the elements are present in a fixed ratio by mass.
6. A compound can be divided into simpler substances by a chemical process.
7. The physical and chemical properties of a compound are completely different from those of its constituents.
3.(a)Luster: Metals are shiny when cut, scratched, or polished.
Malleability: Metals are strong but malleable, which means that they can be easily bent or shaped. ...
Conductivity: Metals are excellent conductors of electricity and heat.
(b)High ionization energies
High electronegativities
Poor thermal conductors
Poor electrical conductors
Brittle solids—not malleable or ductile
Little or no metallic luster
Gain electrons easily
Dull, not metallic-shiny, although they may be colorful
Lower melting points and boiling point than the metals
4) (a) Sedimentation is a process of separating specifically heavier, suspended matter, than the solution is. Solid matter settles on the bottom of the vessel and the liquid above it is poured off. The settling zone is the largest portion of the sedimentation basin.
(b)Filtration is a process used to separate solids from liquids or gases using a filter medium that allows the fluid to pass through but not the solid. The term "filtration" applies whether the filter is mechanical, biological, or physical. The fluid that passes through the filter is called the filtrate
(c)Evaporation is the process of a substance in a liquid state changing to a gaseous state due to an increase in temperature and/or pressure. Evaporation is a fundamental part of the water cycle and is constantly occurring throughout nature.
(d)Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state.
5.The easiest way to separate common salt and ammonium chloride from a mixture is through the process of sublimation.
Explanation: