Video: Qhov pH ntawm cov tshuaj bleach yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
pH ntawm Tshuaj dawb
Cov khoom tseem ceeb hauv tsev tshuaj dawb issodium hypochlorite. Qhov no feem ntau yog diluted nrog dej rau aconcentration ntawm kwv yees li 5 feem pua. Cov pH ntawm qhov kev daws teeb meem no yog kwv yees li 11.
Yog li ntawd, yog bleach yog ib tug acid los yog lub hauv paus?
Rau kev siv hauv tsev, tshuaj dawb feem ntau muaj 5% sodium hypochlorite, muab pH ntawm ib ncig ntawm 11 thiab ua rau nws khaus khaus rau ntawm daim tawv nqaij. Nco ntsoov tshuaj dawb (10-15% sodium hypochlorite) yog alkaline heev (pH ~ 13) thiab tam sim no yog socorrosive uas nws tuaj yeem hlawv tawv nqaij ntawm kev sib cuag. NaOCl ua cov hmoov nplej thiab ua kua.
Dab tsi yog pH ntawm 13?
| 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 |
Tsis tas li ntawd, cov tshuaj bleach puas nce pH?
Tshuaj dawb yog qhov pib ph nruab nrab. Nws yuav tsa tus ph me ntsis thaum ntxiv tab sis raws li cov tshuaj chlorine tau txais, nws yuav poob rov qab. Qee cov khoom pheej yig dua, thiab cov khoom siv ntau dua muaj cov lye, uas yuav ph me ntsis tab sis dua, feem ntau, ph nruab nrab (ntev ntev).
Qhov pH ntawm ammonia yog dab tsi?
Ammonia yog nruab nrab hauv paus, 1.0 M aqueoussolution muaj a pH ntawm 11.6 thiab yog hais tias muaj zog acid ntxiv tosuch ib qho kev daws kom txog thaum cov tshuaj yog nruab nrab ( pH = 7), 99.4% ntawm ammonia molecules yog protonated.
Pom zoo:
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