EXPERIMENT 4

EXPERIMENT 4

 

EXPANSION OF METALS

 

It is called thermal expansion to increased length, volume or other metric dimension that undergoes a physical body due to temperature increase is caused in it by any means. Thermal shrinkage is decreased by decreasing metric properties thereof.

 

 

      

 

 

 

 

 

EXPERIMENT 3

Experiment 3

 

Acids, Bases and salts

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An acid is a substance which, in solution, increases the concentration of hydrogen ions. In combination with the bases, and acid can form salts.

 

 

 

 

 

HYDROCHLORIC ACID

 

 

 

             

 

 

HYDROCHLORIC ACID  broke the cloth.

 

 

 

 

SULPHURIC ACID

 

   

 

SULPHURIC ACID undid the cloth, they were only a few pieces

 

 

ACETIC ACID

 

   

 

ACETIC ACID did nothing to the cloth, just stinks.

 

 

 

 

 

CITRIC ACID

 

 

Citric acid did not know that reaction made in clothes

 

 

 

Experiment 2

Experiment 2

 

Chemical Reactions

 

 

The copper reacts with oxygen in the air and becomes coated  with copper oxide.

Vinegar and lemon juice are acids, they dissolve the layer of copper oxide from the coin´s surface  making it clean again.

Antes

 

Después

 

 

 

 

 

Heat causes the lemon juice  to oxidise. This produces a dark compound and the   screet message is revealed.

 

 

 

 

 

           

 

 

                                  

 

 

 

 

Bleach contains the element chlorine. Chlorine reacts with wáter to reléase oxigen. The oxigen reacts with (oxidises) the compounds that give the dyes their color.

This changes the dyes so that they are no longer coloured.

 

        

 

 

 

 

Experiment 1

Experiment 1

States of the material

In physics and chemistry it shows that, for any substance or mixture, changing the conditions of temperature and pressure, different states or phases can be obtained, called aggregation states of matter in relation to the forces binding the particles (molecules, atoms or ions) that constitute it.

 

 

The boiling and freezing in Mexico may vary depending on the altitude of the area or atmospheric pressure, being the freezing point -3 ° C to 0 ° C and boiling 92 ° C to 100 ° C.