Imibuzo Nengxoxo Yezibonelo: Amafomula E-Molecular kanye Namafomula Angokomlando
Ukufunda i-chemistry akuhlukaniseki emiqondweni eyisisekelo efana namafomula ama-molecule kanye namafomula asebenzayo. Le mibono emibili ibalulekile ngoba inikeza umbono jikelele wokwakheka kwamakhemikhali. Lesi sihloko sizohlola kahle izinkinga zezibonelo futhi sixoxe ngazo. Ngokuqonda kahle le mibono emibili, kunethemba lokuthi uzothola kulula ukubhekana nezinkinga ze-chemistry, ikakhulukazi lezo ezikulesi sahluko.
Ukuqonda Amafomula Obuciko
Ifomula yobufakazi iyifomula ebonisa isilinganiso esilula kakhulu phakathi kwama-athomu akha i-compound. Le fomula ayibonisi inani eliqondile lama-athomu ku-molecule, kodwa ibonisa isilinganiso esincane kakhulu salawo ma-athomu. Isibonelo, ifomula yobufakazi ye-glucose yi-CH₂O, okusho ukuthi ku-molecule eyodwa ye-glucose kunesilinganiso se-athomu eyodwa yekhabhoni kuwo wonke ama-athomu amabili e-hydrogen kanye ne-athomu eyodwa ye-oxygen.
Ukuqonda Amafomula Ama-Molecular
Okwamanje, ifomula yama-molecule inikeza ulwazi mayelana nenani langempela lama-athomu ento ngayinye ku-molecule eyodwa ye-compound. Isibonelo, ifomula yama-molecule ye-glucose yi-C₆H₁₂O₆, okusho ukuthi i-molecule ngayinye ye-glucose iqukethe ama-athomu e-carbon ayisithupha, ama-athomu e-hydrogen ayishumi nambili, nama-athomu e-oxygen ayisithupha.
Izinyathelo Zokunquma Amafomula Angokomlando
1. Thola Ubuningi Bento Ngayinye: Uma iphesenti lesisindo linikeziwe, qala uthole ubunzima bento ngayinye kumagremu ayi-100 ento ehlanganisiwe.
2. Ukuguqula iMisa ibe yiMoles: Guqula inqwaba yesakhi ibe yimoles ngokuhlukanisa inqwaba ngenqwaba yemolar yesakhi ngasinye.
3. Ukunquma Isilinganiso Se-Mole: Thola isilinganiso se-mole sezinto ezikhona. Indlela iwukuhlukanisa inani lama-mole ento ngayinye ngenani elincane kakhulu lama-mole atholiwe.
4. Ukufingqa Ukuqhathanisa: Uma kudingeka, fingqa isilinganiso se-mole nenombolo ephelele eseduze.
5. Ukubhala Amafomula Aqanjiwe: Hlanganisa lokhu kuqhathanisa nokubhala amafomula aqanjiwe.
Izinyathelo Zokunquma Ifomula Yamamolekyuli
Ukuze sithole ifomula yama-molecule, sidinga isisindo se-molar se-compound kanye nefomula yayo ye-empirical. Nazi izinyathelo ezijwayelekile:
1. Thola ifomula yobufakazi: Yenza izinyathelo zokunquma ifomula yobufakazi kuqala.
2. Ukubala i-Molar Mass ye-Empirical Formula: Engeza i-molar mass yento ngayinye kufomula ye-empirical ukuze uthole i-molar mass yefomula ye-empirical.
3. Ukunquma Isisindo Se-Mole Se-Compound: Ngokuvamile kunikezwa ngemibuzo noma izivivinyo.
4. Ukunquma i-N Factor: Hlukanisa i-mole mass ye-compound nge-molar mass yefomula ye-empirical ukuze uthole i-factor (n).
5. Ukunquma Ifomula Yamamolekyuli: Phindaphinda isici (n) ngazo zonke izincwadi ezikufomula ye-empirical ukuze uthole ifomula yamamolekyuli.
Imibuzo Eyisibonelo Nengxoxo
Umbuzo 1: Ukunquma Ifomula Engokomlando
I-compound inokwakheka okulandelayo kwesisindo: i-carbon engu-40% (C), i-hydrogen engu-6,7% (H), kanye ne-oxygen engu-53,3% (O). Thola ifomula yokuhlolwa kwale compound.
I-Jawaban:
1. Guqula iMisa ibe yiMoles:
– Ikhabhoni:
\[
\frac{40 \text{ g}}{12 \text{ g/mol}} = 3,33 \text{ mol}
\]
– I-hydrogen:
\[
\frac{6,7 \text{ g}}{1 \text{ g/mol}} = 6,7 \text{ mol}
\]
- I-oksijini:
\[
\frac{53,3 \text{ g}}{16 \text{ g/mol}} = 3,33 \text{ mol}
\]
2. Ukunquma Isilinganiso Se-Mole:
– C: 3,33 mol / 3,33 = 1
– H: 6,7 mol / 3,33 = 2
– O: 3,33 mol / 3,33 = 1
3. Ukubhala Amafomula Angokomlando:
– Isilinganiso se-mole se-C:H:O singu-1:2:1, ngakho-ke ifomula ye-empirical yi-CH₂O.
Umbuzo 2: Ukunquma Ifomula Yamamolekyuli
Uma isisindo se-molar se-compound enefomula ye-empirical CH₂O saziwa ukuthi singamagremu angu-180/mol, thola ifomula yayo yama-molecule.
I-Jawaban:
1. Isisindo se-molar sefomula ye-empirical CH₂O:
– Isisindo se-molar C = 12 g/mol
– Isisindo se-molar H = (2 x 1) g/mol = 2 g/mol
– Isisindo se-molar sika-O = 16 g/mol
Ngakho-ke isisindo se-molar se-CH₂O = 12 + 2 + 16 = 30 g/mol
2. Thola isici esingu-n:
\[
\frac{mass \text{ molar}}{mass \text{ empirical molar}} = \frac{180 \text{ g/mol}}{30 \text{ g/mol}} = 6
\]
3. Ukunquma Ifomula Yamamolekyuli:
– I-n factor ingu-6, ngakho-ke ifomula yama-molecule ingu-6 x (CH₂O) = C₆H₁₂O₆.
Izibonelo zemibuzo edinga izibalo eziyinkimbinkimbi kakhulu
Umbuzo 3: Ukunquma Ifomula Engokomlando Kusuka Kudatha Yephesenti
Inhlanganisela yezinto eziphilayo iqukethe i-carbon engu-75.0%, i-hydrogen engu-20.0%, kanye ne-nitrogen engu-5.0%. Thola ifomula ye-empirical yenhlanganisela.
I-Jawaban:
1. Guqula iMisa ibe yiMoles:
– Ikhabhoni:
\[
\frac{75.0 \text{ g}}{12.0 \text{ g/mol}} = 6.25 \text{ mol}
\]
– I-hydrogen:
\[
\frac{20.0 \text{ g}}{1.0 \text{ g/mol}} = 20.0 \text{ mol}
\]
– I-nitrogen:
\[
\frac{5.0 \text{ g}}{14.0 \text{ g/mol}} = 0.357 \text{ mol}
\]
2. Ukunquma Isilinganiso Se-Mole:
– 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. Ukubhala Amafomula Angokomlando:
– Isilinganiso se-mole C:H:N ≈ 18:56:1, ifomula ye-empirical ingu-C₁₈H₅₆N.
Isiphetho
Ukuqonda imiqondo yamafomula ama-molecule kanye nama-empiric kubalulekile kumakhemikhali. Ngokulandela izinyathelo ezichazwe kanye nokuzijwayeza izibonelo ezinikeziwe, ngethemba ukuthi uzoba nekhono ekuboneni amafomula ama-empiric kanye nama-molecule amakhemikhali. Zijwayeze njalo ukuze ujulise ukuqonda kwakho ngale nto.
