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Majoritatea substanţelor nu se găsesc în stare pură, ci
     împreună cu alte substanţe, formând amestecuri de
     substanţe.




                               În natură se întâlnesc
                               numeroase amestecuri
Prin punerea împreună a
                               de substanţe.
substanţelor în stări de
agregare identice sau
diferite se formează
amestecuri.
                                                  Oamenii prepară
                                                  amestecuri de substanţe
                                                  în scopuri diferite.
Un amestec poate fi format din:
Un amestec amestecformat din:
       Un poate fi poate fi format din:
                                                    substanţe lichide


                                          diverse
                                          băuturi           lichide de
   substanţe solide                                            răcire



 solul              aliajele

           rocile
                                          substanţe gazoase


         substanţe în cele
                                          aerul            gaze
           trei stări de
                                                          naturale
             agregare
                                 apa
                               tulbure
Un amestec este format din două sau mai
multe componente.

Substanţele componente pot fi luate
în diverse proporţii.

Fiecare substanţă componentă îşi
păstrează proprietăţile fizice şi
chimice.
Amestecarea componenţilor în stare
gazoasă se face de la sine,datorită
mişcării dezordonate a particulelor
componente (difuziunea).

                                Amestecarea unui lichid cu substanţe
                                gazoase,lichide sau solide.



       Amestecarea componentelor în stare solidă
       se realizează în laborator cu ajutorul
       mojarului cu pistil.
Un amestec de substanţe nu are proprietăţi fizice bine definite.


        Proprietăţile unui amestec sunt determinate de:

          felul                    numărul               cantitatea fiecărei
      componentelor              componentelor             componente

        Substanţele pure au proprietăţi determinate prin constante
   fizice.Proprietăţile unui amestec nu pot fi exprimate prin constante
fizice.Punctul de topire,punctul de fierbere şi densitatea sunt variabile,
               fiind determinate de comoziţia amestecului.
aerul                                                  aliajele
           apele minerale         apa de mare


saramura           antigel                   tinctura de iod


   apa oxigenată             apa de var
                                          zeama bordeleză

                seva brută
                                                băuturi alcoolice

  băuturi răcoritoare              laptele

               produsele farmaceutice
Manual Chimie clasa aVII-a,Ed Sigma
             referate.ro
             didactic.ro
          Google/imagini
          ro.wikipedia.org

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0 amestecuri

  • 1.
  • 2. Majoritatea substanţelor nu se găsesc în stare pură, ci împreună cu alte substanţe, formând amestecuri de substanţe. În natură se întâlnesc numeroase amestecuri Prin punerea împreună a de substanţe. substanţelor în stări de agregare identice sau diferite se formează amestecuri. Oamenii prepară amestecuri de substanţe în scopuri diferite.
  • 3. Un amestec poate fi format din: Un amestec amestecformat din: Un poate fi poate fi format din: substanţe lichide diverse băuturi lichide de substanţe solide răcire solul aliajele rocile substanţe gazoase substanţe în cele aerul gaze trei stări de naturale agregare apa tulbure
  • 4. Un amestec este format din două sau mai multe componente. Substanţele componente pot fi luate în diverse proporţii. Fiecare substanţă componentă îşi păstrează proprietăţile fizice şi chimice.
  • 5. Amestecarea componenţilor în stare gazoasă se face de la sine,datorită mişcării dezordonate a particulelor componente (difuziunea). Amestecarea unui lichid cu substanţe gazoase,lichide sau solide. Amestecarea componentelor în stare solidă se realizează în laborator cu ajutorul mojarului cu pistil.
  • 6. Un amestec de substanţe nu are proprietăţi fizice bine definite. Proprietăţile unui amestec sunt determinate de: felul numărul cantitatea fiecărei componentelor componentelor componente Substanţele pure au proprietăţi determinate prin constante fizice.Proprietăţile unui amestec nu pot fi exprimate prin constante fizice.Punctul de topire,punctul de fierbere şi densitatea sunt variabile, fiind determinate de comoziţia amestecului.
  • 7. aerul aliajele apele minerale apa de mare saramura antigel tinctura de iod apa oxigenată apa de var zeama bordeleză seva brută băuturi alcoolice băuturi răcoritoare laptele produsele farmaceutice
  • 8. Manual Chimie clasa aVII-a,Ed Sigma referate.ro didactic.ro Google/imagini ro.wikipedia.org