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You probably noticed that in one of the containers can easily know what is mixed, while the other does not. You can only find out if it is only water or a mixture of water with some other substance, or if I try do some tests! But, as we know to prove things we do not know, without even being aware that it is something extremely dangerous, it is best to conduct some tests! Well, we experimentally verify some property! In the case of salt water in relation to water that usually drank (drinking water) we can see that salt water is a good conductor of electric current as the water is not potable. When one speaks of purity of a material implication is talking about a comparison between an ideal situation (a sample of 100% of a single substance) and real (when we really have the substance of interest in the sample of the material we are talking about .) The purity of a chemical substance depends on the purification procedures that were used in its preparation, and its determination is subject to detection limits of the analysis methods available chemicals. In the case of water and salt, have a homogeneous mixture because this mixture results in the formation of only one phase (here we have what we call solution). In the case of water and sand, by visual observation of the system we can verify the existence of two phases (solid and liquid, with a separation surface visible) and then we have a mixed bag. ACTIVITY Repeat the same activity, now using in a container, sugar and water; another, oil and water; another, vinegar and water and in another, oil, vinegar and sand. Check which ones you'll find in a homogeneous mixture and which will be found a heterogeneous mixture. Record your results and then check with your classmates and with the teacher other occurrences of mixtures in our day-to-day, so making a table with the most used mixtures. How about making a list of products you use every day, for example, toiletries, cleaning, food and beverages? After completing the list, make sure the products you chose are formed by homogeneous or heterogeneous mixtures. Together with his teacher and classmates, compare checking class lists what types of mixtures are best used by us daily.
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Vjerojatno ste primijetili da je u jednom od kontejnera lako može znati što je mješoviti, a drugi ne. Vi samo možete saznati ako je to samo voda ili mješavina vode s nekom drugom tvari, ili ako ja pokušati napraviti neke testove! Ali, kao što znamo da se dokaže ono što ne znamo, bez čak i svjesni da je to nešto vrlo opasno, najbolje je provesti neke testove! Pa, mi eksperimentalno provjeriti neke imovine! U slučaju slane vode u odnosu na vodu koja se obično popiju (pitke vode) možemo vidjeti da je slana voda je dobar vodič električne struje, jer voda nije za piće. Kada se govori o čistoći materijalnog implicitno govori o odnosu između idealnoj situaciji (uzorak od 100% od jedne tvari) i stvarnog (kad smo stvarno imati suštinu interesa u uzorku materijala govorimo o .) Čistoća kemijske tvari ovisi o pročišćavanje postupaka koji su korišteni u njegovoj izradi, a njezina je odlučnost podliježe detekcije metoda ispitivanja dostupne kemikalije. U slučaju vode i soli, imaju homogenu smjesu jer je to mješavina rezultira u formiranju samo jedne faze (ovdje imamo ono što mi zovemo rješenje). U slučaju vode i pijeska, od vizualnog promatranja sustava možemo potvrditi postojanje dvije faze (kruta i tekuća, s odvajanja površine vidljiv), a onda imamo mješoviti vrećicu. AKTIVNOST Ponovite istu djelatnost, sada koriste u kontejner, šećera i vode, drugi, ulja i vode, drugi, octa i vode, au drugu, ulja, octa i pijesak. Provjerite one koje ćete pronaći u homogenom smjesom i koje će se naći heterogenu smjesu. Snimite svoje rezultate, a zatim provjerite sa svojim kolegama i sa nastavnikom drugim pojavama smjesa u našem dana u dan, pa bi tablicu s najviše koriste smjese. Kako o izradi popis proizvoda koje svakodnevno koristite, primjerice, kupaonske, čišćenje, hrana i piće? Nakon završetka popisa, pobrinite se proizvodi ste izabrali formiraju homogene ili heterogene smjese. Zajedno sa svojim učiteljem i kolege, usporedite provjeru klase liste koje vrste od mješavine najbolje koriste kod nas svaki dan.