Video: Qhov ntau npaum li cas rau lub hauv paus?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov ntsuas pH thaj tsam ntawm 0 mus rau 14. A pH ntawm 7 yog nruab nrab. pH tsawg dua 7 yog acidic. Ib qho pH ntau dua 7 yog qhov yooj yim.
Ua kom pom qhov no, qhov pH ntau npaum li cas rau lub hauv paus?
Cov pH ntsuas feem ntau hais rau ntau los ntawm 0 mus rau 14, thiab cov kev daws teeb meem feem ntau poob hauv qhov no ntau , txawm tias yuav tau txais ib pH qis dua 0 lossis siab dua 14. Txhua yam hauv qab 7.0 yog acidic, thiab txhua yam saum toj no 7.0 yog alkaline, lossis yooj yim.
Ib tug kuj yuav nug, dab tsi muaj pH ntawm 14? Kev daws ntawm cov kua qaub muaj zog, xws li hydrochloric acid, ntawm qhov concentration 1 mol dm−3 muaj pH ntawm 0. Ib qho kev daws ntawm alkali muaj zog, xws li sodium hydroxide nyob rau hauv concentration 1 mol dm−3, muaj pH ntawm 14.
Ib sab saum toj no, pH ntawm 11 yog dab tsi?
| Tus nqi pH | H+ Concentration txheeb ze rau dej ntshiab | Piv txwv |
|---|---|---|
| 11 | 0.000 1 | tshuaj ammonia |
| 12 | 0.000 01 | soapy dej |
| 13 | 0.000 001 | tshuaj dawb, qhov cub ntxuav |
| 14 | 0.000 000 1 | kua dej huv |
Vim li cas pH ntsuas thaj tsam li ntawm 0 txog 14?
Li no a ntau ntawm 0 rau 14 muab sensible (tab sis tsis meej) "bookends" rau cov nplai . Ib tug tuaj yeem mus me ntsis hauv qab xoom thiab me ntsis saum toj no 14 Nyob rau hauv dej, vim hais tias cov concentration ntawm hydronium ions los yog hydroxide ions tuaj yeem tshaj ib tus molar.
Pom zoo:
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