Cov txheej txheem:
Video: Koj yuav daws qhov teeb meem chemistry nrog titration li cas?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Teeb meem Titration Step-by-Step Solution
- Kauj ruam 1: Txiav txim siab [OH-]
- Kauj Ruam 2: Txiav txim seb pes tsawg moles ntawm OH-
- Kauj Ruam 3: Txheeb xyuas tus naj npawb ntawm moles ntawm H+
- Kauj Ruam 4: Txiav txim siab qhov concentration ntawm HCl.
- Teb.
- Mkua qaubVkua qaub = KuvpuagVpuag
Raws li txoj cai, cov mis rau titration yog dab tsi?
Siv cov titration mis . Yog tias tus neeg ua phem thiab tus neeg tshuaj xyuas muaj qhov sib piv 1: 1 mole, tus mis yog molarity (M) ntawm cov kua qaub x ntim (V) ntawm cov kua qaub = molarity (M) ntawm lub hauv paus x ntim (V) ntawm lub hauv paus. (Molarity yog qhov concentration ntawm cov tshuaj hais tawm raws li tus naj npawb ntawm moles ntawm solute ib liter ntawm kev daws.)
Ib yam nkaus, puas yog NaOH kua qaub lossis hauv paus? NaOH yog a puag vim tias thaum yaj hauv dej nws tawm mus rau Na+ thiab OH-ions. Nws yog OH- (hydroxyl ion) uas ua rau NaOH a puag . Hauv cov ntsiab lus classic a puag yog txhais raws li kev sib xyaw uas cuam tshuam nrog ib qho kua qaub tsim cov ntsev thiab dej raws li qhia los ntawm kab zauv hauv qab no. NaOH +HCl = NaCl+H2O.
Hais txog qhov no, peb tuaj yeem daws qhov teeb meem ntawm cov kua qaub thiab cov hauv paus li cas?
Tsis
- Yog tias koj tsuas muaj cov kua qaub tsis muaj zog. Txiav txim siab cov kua qaub (piv txwv tias tsis muaj kev sib cais). Saib lossis txiav txim siab Ka.
- Yog tias koj muaj cov kua qaub tsis muaj zog THIAB lub hauv paus sib txuas. Daws rau qhov tsis.
- Yog tias koj tsuas muaj lub hauv paus conjugate. Kev daws rau pH ntawm lub hauv paus siv Kb thiab qhov sib npaug ntawm hydrolysis.
Dab tsi yog molarity ntawm NaOH?
Piv txwv li, 0.25 M. NaOH kev daws teeb meem (qhov no tau nyeem raws li 0.25 molar) muaj 0.25 moles ntawm sodium hydroxide nyob rau hauv txhua liter ntawm kev daws. Txhua lub sijhawm koj pom cov ntawv luv M koj yuav tsum tam sim xav txog nws li mol/L.
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