Cleaning with salt simple and complex substances

Theme: CLEANING WITH SALT
SIMPLE AND COMPLEX SUBSTANCES

Dissolution of contaminated table salt . In a vessel containing 20 ml of distilled water, stirring in portions with a glass rod, table salt is added, which is added until all the salt has dissolved. Determine what changes occur in this process.

Filter preparation.
To do this, square filter paper is folded into four. The corner of the square is cut with scissors. After that, we attach to the paper in the form of mu and insert the funnel. At the same time, its edges should be 0.5 cm lower to the edge.
In other words, the solution filter is called the coolant filter.
Filter evaporation.

At the end of the experiment, a report is compiled for the next one in a row.

1. The content of the work performed.
2. List of tools used, with the use of chemicals and with chemical reagents .
3. Definition of this course of work and a summary of the content of the experiment. Image of used devices. In on key
This is not a description of the dishes of my apparitions.
4. Conclusions based on the results obtained.
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Polluted cooking
salt
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Salt Dissolution, Salt Filtration, Pure Salt
Evaporation of the filtrate

Substances are simple (elementary) and complex compounds.

• Substances consisting of atoms of one element are called simple, for example, hydrogen, oxygen, iron, sulfur.
• Substances consisting of atoms of different elements are called complex, for example, water, salt, sugar.
Classification of substances depending on their state:
Substances :
Simple substances
1. Hydrogen. 5. tin .
2. Copper. 6. Carbon.
3 . Zinc. 7. Chlorine.
4. Lead. 8. Oxygen.

Complex Substances

1. Oxygen oxide , water-oxides.
2. Bases of sodium hydroxide.
3. Sulfuric acid - acids.
4. Salt, limestone.

Each of the 118 elements known to date can be considered as a separate simple substance. However , some of them can easily form a number of simple substances in the form of allotropic modifications. In such substances, the differences in all respects are determined by the relationship. For example, carbon can form simple substances as substances like diamond graphite carbine Fluarene sulfur forms such simple substances as rhombic and plastic sulfur phosphorus is red white and black oxygen occurs in the form of ordinary oxygen and ozone. The phenomena of allotropy and simple matter are absolutely indicative.

For example, - Genus is represented by a deposit of atomic hydrogens. However, in their own way they are very different in the quality of graphite, which is found earlier, and diamond is a precious stone (compare the properties on graphite yourself) .
Graphite and diamond, being allotropic species before the carbon change, can pass from one to the other, while sharply changing their own. st. va It doesn't look like graphic geeks are accepted that way, they're the same type. Whether it is on the amount of the element carbon can be proved by the sufficiency of combustion in oxygen, in which the same substance, carbon monoxide, is formed.
Carbon monoxide of the genus is a complex substance consisting of atoms of individual elements - carbon and oxygen.
The number of complex substances is several million.
• Decomposition The process of decomposition to determine the composition of substances is called analysis.
• The process of creating links is called synthesis.
The composition in a certain way defines the area of lysis.
• Establishing the constituent elements that form the relationship is called qualitative analysis.
• Determining the number of items that make up a relationship analysis is called quantitative analysis.
Keywords: simple substance, element, compound, complex substance, allotropy, allotropic form of an ion, graphite, diamond, carbon, carbon monoxide, analysis, synthesis, qualitative analysis, quantitative analysis.

Questions and tasks:

1. Give examples of simple substances.
2. Give examples of complex substances.
Z. What do you understand by allotropy?
4. Name the elements that form various simple substances.
3. What is the difference between analysis and synthesis?
6. Define the concepts of qualitative and quantitative analysis.