Mibvunzo yeMienzaniso neKukurukurirana: Mafomura eMolecular uye Mafomura eEmpirical
Kudzidza kemesitiri hakuparadzaniswi nepfungwa huru dzakadai semamorekuru uye maempirical formulas. Pfungwa mbiri idzi dzakakosha nekuti dzinopa ruzivo rwekuumbwa kwemakemikoro. Chinyorwa chino chichanyatsoongorora matambudziko emuenzaniso uye chichakurukura nezvawo. Nekunzwisisa kwakanaka kwepfungwa mbiri idzi, tinotarisira kuti zvichave nyore kutarisana nematambudziko ekemesitiri, kunyanya ari muchitsauko chino.
Kunzwisisa Maitiro Ekusimbisa
Fomura yekuongorora (empirical formula) iforamu inoratidza chiyero chiri nyore pakati pemaatomu anoumba chinhu. Fomura iyi hairatidzi huwandu chaihwo hwemaatomu ari mumorekuru, asi chiyero chidiki chete chemaatomu iwayo. Semuenzaniso, fomura yekuongorora yeglucose iCH₂O, zvinoreva kuti mumorekuru imwe yeglucose mune chiyero cheatomu imwe chete yekabhoni yemaatomu maviri ehydrogen neatomu imwe chete yeokisijeni.
Kunzwisisa Mafomula eMolecular
Panguva iyi, fomura yemamorekuru inopa ruzivo nezvehuwandu chaihwo hwemaatomu echinhu chimwe nechimwe mumorekuru imwe chete yekombuta. Semuenzaniso, fomura yemamorekuru yeglucose iC₆H₁₂O₆, zvichireva kuti molekyuru yega yega yeglucose ine maatomu matanhatu ekabhoni, maatomu gumi nemaviri ehydrogen, uye maatomu matanhatu eokisijeni.
Matanho Ekuona Maitiro Ekusimbisa
1. Sarudza Huremu hweChinhu Chimwe Nechimwe: Kana huwandu hwehuremu hwapihwa, tanga waona huremu hwechinhu chimwe nechimwe mumagiramu zana echinhu chacho.
2. Kushandura Huremu kuita Mamota: Shandura huremu hwechinhu kuita mamota nekukamura huremu nehuremu hwemota hwechinhu chimwe nechimwe.
3. Kuziva Chiyero cheMole: Tsvaga chiyero chemole chezvinhu zviripo. Nzira yacho ndeyekupatsanura huwandu hwemamoles echinhu chimwe nechimwe nenhamba diki yemamoles akawanikwa.
4. Kutenderedza Kuenzanisa: Kana zvichidikanwa, tenderedza chiyero chemole kusvika kunhamba yakazara iri pedyo.
5. Kunyora Mafomura Ekusimbisa: Sanganisa kuenzanisa uku kuti unyore mafomura ekusimbisa.
Matanho Ekuona Maitiro EmaMolecular
Kuti tizive fomura yemamorekuru, tinoda molar mass yecompound uye fomura yayo ye empirical. Heano matanho akajairika:
1. Sarudza Fomura Yekufungidzira: Tanga watora matanho ekuona fomura yekuongorora.
2. Kuverenga Molar Mass yeEmpirical Formula: Wedzera molar masses yechinhu chimwe nechimwe mu empirical formula kuti uwane molar mass ye empirical formula.
3. Kuziva Huremu hweMole yeCompound: Inowanzo kupiwa mumibvunzo kana mukuyedza.
4. Kuziva N Factor: Govanisa mole mass yekomponi ne molar mass ye empirical formula kuti uwane factor (n).
5. Kuziva Fomura yeMolecular: Wedzera factor (n) nezvinyorwa zvese zviri mufomura ye empirical kuti uwane fomura yemolecular.
Mibvunzo yemuenzaniso nekukurukurirana
Mubvunzo 1: Kuziva Fomura Yekufungidzira
Musanganiswa une huwandu hunotevera: 40% kabhoni (C), 6,7% hydrogen (H), uye 53,3% oxygen (O). Sarudza fomura yekuongorora yemusanganiswa uyu.
Jawaban:
1. Chinja Mass kuita Moles:
– Kabhoni:
\[
\frac{40 \text{ g}}{12 \text{ g/mol}} = 3,33 \text{ mol}
\]
– Hydrogen:
\[
\frac{6,7 \text{ g}}{1 \text{ g/mol}} = 6,7 \text{ mol}
\]
- Okisijeni:
\[
\frac{53,3 \text{ g}}{16 \text{ g/mol}} = 3,33 \text{ mol}
\]
2. Kuziva Chiyero cheMole:
– C: 3,33 mol / 3,33 = 1
– H: 6,7 mol / 3,33 = 2
– O: 3,33 mol / 3,33 = 1
3. Kunyora Mafomura Ekusimbisa:
– Chiyero chemole cheC:H:O i1:2:1, saka fomura yekuongorora iCH₂O.
Mubvunzo 2: Kuziva Fomura reMamorekuru
Kana huwandu hwemolar hwemusanganiswa une fomura ye empirical CH₂O huchizivikanwa kuti huri 180 gramu/mol, tsvaga fomura yacho yemamorekuru.
Jawaban:
1. Molar huremu hwefomura yekuongorora CH₂O:
– Huremu hwemamota C = 12 g/mol
– Huremu hwemamota H = (2 x 1) g/mol = 2 g/mol
– Huremu hwemamolar hweO = 16 g/mol
Saka huwandu hwemolar hweCH₂O = 12 + 2 + 16 = 30 g/mol
2. Sarudza chinhu chinonzi n:
\[
\frac{mass \text{ molar}}{mass \text{ empirical molar}} = \frac{180 \text{ g/mol}}{30 \text{ g/mol}} = 6
\]
3. Kuziva Fomura yeMolecular:
– N factor i6, saka fomura yemamorekuru i6 x (CH₂O) = C₆H₁₂O₆.
Mienzaniso yemibvunzo inoda kuverenga kwakaoma kunzwisisa
Mubvunzo 3: Kuona Fomura Yekufungidzira kubva paData rePesenti
Chinhu cheorganic chine 75.0% kabhoni, 20.0% hydrogen, uye 5.0% nitrogen. Sarudza fomura ye empirical yechinhu ichi.
Jawaban:
1. Chinja Mass kuita Moles:
– Kabhoni:
\[
\frac{75.0 \text{ g}}{12.0 \text{ g/mol}} = 6.25 \text{ mol}
\]
– Hydrogen:
\[
\frac{20.0 \text{ g}}{1.0 \text{ g/mol}} = 20.0 \text{ mol}
\]
– Nitrogen:
\[
\frac{5.0 \text{ g}}{14.0 \text{ g/mol}} = 0.357 \text{ mol}
\]
2. Kuziva Chiyero cheMole:
– C: 6.25 mol / 0.357 = 17.5 ≈ 18
– H: 20.0 mol / 0.357 = 56 ≈ 56
– N: 0.357 mol / 0.357 = 1
3. Kunyora Mafomura Ekusimbisa:
– Chiyero chemole C:H:N ≈ 18:56:1, fomura yekuongorora ndeye C₁₈H₅₆N.
Mhedziso
Kunzwisisa pfungwa dzemamorekuru nemafomura ekuongorora kwakakosha mukemistri. Nekutevera matanho akatsanangurwa uye kushandisa mienzaniso yakapihwa, unotarisira kuti uchava nehunyanzvi mukuona mamorekuru nemafomura emakemikari. Dzidzira nguva dzose kuti uwedzere kunzwisisa kwako nezvechinhu ichi.
