Video: Lub ntsiab lus ntawm pKa nqi yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov ntsiab lus tseem ceeb: pKa txhais
Cov pKa nqi yog ib txoj kev siv los qhia lub zog ntawm cov kua qaub. pKa yog lub cav tsis zoo ntawm cov kua qaub dissociation tas li los yog Ka tus nqi . Ib qho qis pKa nqi qhia tias muaj zog acid. Ntawd yog, qis dua tus nqi qhia tias cov kua qaub ntau dissociates hauv dej.
Ib yam li ntawd, qhov txawv ntawm pH thiab pKa yog dab tsi?
pKa : pKa yog tus nqi tsis zoo ntawm lub logarithmic ntawm Ka. pH : pH yog tus nqi logarithmic ntawm inverse ntawm H + concentration. pKa : pKa qhia seb cov kua qaub puas yog cov kua qaub uas muaj zog lossis tsis muaj zog acid.
Ib sab saum toj no, pKa qis txhais li cas? Yog koj muaj ib tug qis pka , uas txhais tau tias tias koj tus nqi siab heev. Muab los ntawm qhov sib npaug -log [Ka] = pKa . -> 10^- pKa = Ka. A qis pKa txhais tau tias tus nqi Ka siab dua thiab tus nqi Ka siab dua txhais tau tias Cov kua qaub dissociates yooj yim dua vim tias nws muaj qhov loj dua ntawm Hydronium ions (H3O+).
Yog li ntawd, chav tsev ntawm pKa yog dab tsi?
Hais lus nruj me ntsis Kib tsis muaj units , tab sis nws yog kwv yees siv cov concentrations muab nce mus rau units ntawm molarity (mol dm-3). Cov chav tsev yog 'tsis quav ntsej' thaum noj lub logarithm thiaj li pKib yog unitless.
Dab tsi yog pKa?
Cov ntsiab lus tseem ceeb: pKa Lus Txhais The pKa tus nqi yog ib txoj kev siv los qhia lub zog ntawm cov kua qaub. pKa yog lub cav tsis zoo ntawm cov kua qaub dissociation tas li los yog Ka tus nqi. Ib qho qis pKa tus nqi qhia tias muaj zog acid. Ntawd yog, tus nqi qis dua qhia tias cov kua qaub ntau dissociates hauv dej.
Pom zoo:
Dab tsi yog lub ntsiab lus ntawm ib pab pawg ntawm cov lus teev sijhawm?
Nyob rau hauv chemistry, ib pab pawg (tseem hu ua tsev neeg) yog ib kem ntawm cov ntsiab lus nyob rau hauv lub sij hawm lub sij hawm ntawm cov tshuaj. Muaj 18 pawg lej nyob rau hauv daim ntawv teev sijhawm; cov kab f-block (nruab nrab ntawm pawg 3 thiab 4) tsis suav nrog
Lub ntsiab lus ntawm lub hauv paus lo lus meter nyob rau hauv lo lus tus pas ntsuas kub yog dab tsi?
Lub hauv paus chiv keeb ntawm lo lus 'Thermometer' Qhov thib ob ntawm lo lus, 'meter', los ntawm Fabkis -mètre (uas muaj nws cov hauv paus hauv lub post-classical Latin: -meter, -metrumand lub ancient Greek, -Μέτρο ν, lossis metron, uas txhais tau tias ntsuas qee yam, xws li qhov ntev, qhov hnyav, lossis dav)
Dab tsi yog lub ntsiab lus ntawm kev hloov pauv lom neeg hauv cov ntsiab lus ntawm allele zaus?
Microevolution, los yog evolution ntawm ib tug me me, yog txhais raws li ib tug kev hloov nyob rau hauv lub zaus ntawm noob variants, alleles, nyob rau hauv ib tug pej xeem ntau tiam. Lub teb ntawm biology uas kawm txog allele frequencies nyob rau hauv cov pejxeem thiab yuav ua li cas lawv hloov lub sij hawm yog hu ua pej xeem noob caj noob ces
Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua
Lub npe ntawm tag nrho cov ntsiab lus ntawm lub sij hawm lub rooj yog dab tsi?
Tus lej xov tooj yog nws tus lej atomic, uas yog tus naj npawb ntawm protons hauv txhua qhov ntawm nws cov atoms. H - Hydrogen. Nws - Helium. Lithium roj teeb. Ua - Beryllium. B - Boron. C - Cov pa roj carbon. N - Nitrogen. O - Cov pa