Ukuze ufumane inkcazelo ngendlela yokukhangela eninzi izinto kufuneka ukwazi wonke umfundi

Ikhosi chemistry school sikhokelo ngenzululwazi entsonkothileyo. Ukususela ekuqaleni, abafundi bazama ukufumana phandle indlela yokucombulula imingeni zoyilo. Masithi kwi kwinqanaba lokuqala, ukuba ube nokusebenzisa encinane eluncedo, kodwa ukuba umfundi afunde, umzekelo, ukufumana indlela ezininzi kwezinto unreacted, ukuze ibango kakuhle ukuba impumelelo enkulu.

Cinga umzekelo olula le ngxaki, ngokusekelwe ongafunda indlela yokucombulula ezimbaxa ngakumbi. Zicingele ukuba ukutshiswa ngokupheleleyo le carbon monoxide (II) uthathe iilitha 11.2. Zingaphi iigrem CO2 ube nako ukufumana?

1. ukwenza inxaki reaction.

CO + O2 = CO2

2. alinganayo oksijini. Kukho imithetho ethile, nokuthe kwiimeko ezininzi anokukunceda. Qala ukulungisa okuza kwento, inani leyo atom limnqakathi. Kulo mzekelo, ioksijini kwi CO molecule. Ukuze uwubeke factor 2. Ukususela ekhohlo kwakhiwa athom zekhabhoni ezimbini, yaye tye - nye, ize emva koko ukuze ahlangule CO2 2. Ngenxa yoko, nathi nakufumana nto noko;

2Co + O2 = 2CO2

Njengoko ubona, emacaleni ekhohlo kunye nelungelo athom ezine oksijini. Carbon kananjalo zigcinwa esikalini. Ngenxa yoko, nathi equalized ekunene.

3. Emva koko, kufuneka ufumane inani O2. Ukumiselwa kwe isiphumlisi kubafundi ngumsina kakhulu kwaye kunzima ukukhumbula, ngoko sisebenzisa enye indlela eyahlukileyo. Khumbula ukuba kukho imali izinyo leyo ilingana no 22.4 l / nolovane. Kufuneka ufumane indlela iintuku ezininzi (n) wangena indlela :. N = V / V m Kwimeko yethu, n = 0,5 Mol.

4. Ngoku ke zoba inani. Isixa oksijini wangena indlela isiqingatha n (CO2). Oku kulandela ukusuka yokuba 0.5 abamenzelayo / adla ka 1 = x / 2. A umlinganiselo olulula kumaxabiso amabini kuye kwanceda ukwenza inxaki ekunene. Xa sifumana x = 1, singakwazi ukufumana impendulo yombuzo yokufumana indlela ubunzima.

5. I ntiyiso ukuqala kuya kufuneka ukuba ukukhumbula omnye ifomula: m = M * n. Le yokugqibela variable ndiyifumene, kodwa ukuba benze ntoni M? mass izinyo - into ngokomfuniselo ukuseta kuthelekiswa hydrogen. It luchazwa yileta M. Ngoku siyazi ukuba m (CO2) = 12 g / Mol * 1 adla = 12 g Oko ndafumana impendulo. Njengoko ubona, akukho nto kunzima.

Lo msebenzi Kulula kakhulu kwi ezahlukeneyo kwabanye. Kodwa eyona nto ibalulekileyo - ukuqonda ukufumana njani ubunzima. Khawube nomfanekiso-ngqondweni molecule into. Kudala kwaziwa ukuba igala iqulathe 6 * 10 ^ 23 iimolekyuli. Ngelo xesha lifanayo element lwezakhi kukho ubunzima oomatshini 1 Mol nganye. Maxa wambi kuyimfuneko ukubala ubunzima izinyo ukwimo. Masithi M (H20) = 18 grams / nolovane. Oko kukuthi, omnye iperoksayidi molecule une M = 1 gram / Mol. Kodwa ke amanzi iqulethe athom ezimbini H. Kwakhona, musa ukulibala malunga kukho ioksijini, nto leyo lusinika grams ezongezelelweyo 16. UPawulos, sinokuyifumana 18 grams / nolovane.

Ubunzima ubalo ithiyori kuza kuba luncedo pfunaka. Ingakumbi kubafundi balindele yocweyo imichiza. Musa ukumoyika izwi, ukuba ukufunda esikolweni non-core. Kodwa ukuba chemistry - izifundo zakho kwiprofayile, kungcono ukuba ukubaleka nezimaphambili ezingundoqo. Ngoko ke, ngoku uyazi ukuba ufumane indlela ubunzima. Khumbula ukuba chemistry kubaluleke kakhulu ukuba umntu oluthe nolwazelelelo ngubani hayi kuphela owaziyo ezinye algorithms, kodwa uyazi ukuba mawuzisebenzise njani.