Chiyambi cha ph mita

Tanthauzo la ph mita

PH mita imatanthawuza chida chomwe chimagwiritsidwa ntchito kudziwa pH ya yankho. Mita ya pH imagwira ntchito pa batire ya galvanic. Mphamvu ya electromotive pakati pa ma electrode awiri a batri ya galvanic imachokera ku lamulo la Nerns, lomwe silimangokhudzana ndi mphamvu za electrode, komanso zokhudzana ndi kuchuluka kwa ayoni a haidrojeni mu yankho. Pali mgwirizano wofananira pakati pa mphamvu ya electromotive ya batri yoyamba ndi kuchuluka kwa ayoni wa haidrojeni, ndipo logarithm yoyipa ya hydrogen ion concentration ndi pH mtengo. Mita ya pH ndi chida chowunikira chodziwika bwino, chomwe chimagwiritsidwa ntchito kwambiri paulimi, kuteteza chilengedwe komanso mafakitale. Dothi pH ndi chimodzi mwazinthu zofunika kwambiri za dothi. Zinthu monga kutentha ndi mphamvu ya ionic ya yankho lomwe likuyenera kuyesedwa liyenera kuganiziridwa pakuyezera pH.

Mfundo ya ph mita

pH imatanthauzidwa ngati logarithm yoyipa ya hydrogen ion concentration mu njira yamadzi. Ngakhale izi zikumveka zovuta, m'mawu osavuta, pH ndi nambala yomwe imagwiritsidwa ntchito kuwerengera acidity kapena alkalinity ya yankho. Nambalayi imasonyeza chiwerengero cha ayoni a haidrojeni omwe chinthu china chake chingatulutse mu yankho. Mu mtundu wa pH, pH ya 7 imawonedwa ngati yopanda ndale. Mayankho okhala ndi pH ya 0-7 amaonedwa ngati acidic, ndipo mayankho omwe ali pamwamba pa 7 mpaka 14 amatchedwa njira zamchere. Muzinthu zachilengedwe, pH ndiyofunikira. Chifukwa cha pH yosinthidwa mosamala, ma biomolecules ambiri m'thupi lathu amatha kugwira ntchito zabwino kwambiri. Ngakhale mumayendedwe oyesera, pH yofunikira iyenera kusungidwa kuti mupeze zotsatira zolondola. Chifukwa chake, pakuyesa kwachilengedwe, chipangizo chotchedwa pH meter chimagwiritsidwa ntchito kuyang'anira pH mosamala.

The pH mita ndi pH-responsive electrode yomwe imayesa ntchito ya ayoni wa haidrojeni mu yankho ndikutumiza izi. Chipangizocho chimakhala ndi machubu awiri agalasi, omwe ali ndi electrode, electrode yowunikira komanso sensor electrode. Elekitirodi yowunikira imapangidwa ndi yankho lodzaza ndi KCl, pomwe sensa electrode ili ndi yankho la bafa lomwe lili ndi pH ya 7, ndipo waya wasiliva wokutidwa ndi siliva chloride umamizidwa munjira ziwirizi. Kumapeto kwa sensa electrode ndi babu wopangidwa ndi galasi porous yokutidwa ndi silika ndi zitsulo mchere.

Kuti muyese pH ya yankho, mita ya pH imamizidwa mu yankho. Pambuyo bulb ya sensa electrode kukhudzana ndi yankho, ayoni haidrojeni mu njira yothetsera zitsulo zitsulo pa babu. Kulowa m'malo kwa ayoni zitsulo kumapangitsa kuti magetsi aziyenda mu waya wachitsulo, womwe umawerengedwa ndi voltmeter.

Mita ya pH ndi imodzi mwa zida zomwe zimagwiritsidwa ntchito kwambiri m'ma laboratories achilengedwe. Nthawi zonse pendani pH ya ma buffers, mayankho ndi ma reagents kuti muwonetsetse kuti zoyeserera ndizolondola. Kuti zitsimikizidwe kuwerengedwa kolondola, zida ziyenera kuyesedwa pafupipafupi.

Kugwiritsa ntchito PH mita chowunikira

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Kugwiritsa ntchito pH mita mu electroplating madzi owonongeka

Kugwiritsa ntchito pa intaneti PH Meter mu Viwanda

Kuyesa kwa PH mita