Qhov sib txawv tseem ceeb ntawm cov kua qaub tsis muaj zog thiab cov kua qaub diluted yog cov kua qaub uas tsis muaj zog yog cov khoom sib xyaw ua ke thaum yaj hauv dej, whereas dilute acid yog cov tshuaj muaj dej ntau dua cov kua qaub.
Ib qho kua qaub yog ib qho sib xyaw uas tuaj yeem sib cais hauv dej kom tso cov protons (hydrogen ions). Yog li ntawd, cov kua qaub muaj pH qis dua 7. Muaj ob hom kua qaub uas muaj zog acids thiab tsis muaj zog acids raws li cov kua qaub zog. Tab sis raws li qhov concentration ntawm cov kua qaub, muaj ob hom kev daws teeb meem raws li concentrated acid thiab dilute acid.
Dab tsi yog qhov qaug zog acid?
Ib lub kua qaub tsis muaj zog yog ib qho sib xyaw ua ke uas ib nrab dissociates rau hauv nws cov ions thaum yaj hauv dej. Kev pab tsis muaj zog yog conjugate acid ntawm lub hauv paus tsis muaj zog. Tsis tas li ntawd, cov kua qaub tsis muaj zog muaj pH siab dua piv rau qhov kev pabcuam muaj zog ntawm tib qhov concentration. Thaum sau cov tshuaj sib npaug rau kev sib cais ntawm cov kua qaub uas tsis muaj zog, peb siv ob lub xub los suav nrog ob qho tib si rau pem hauv ntej thiab rov qab vim tias qhov kev sib cais ntawm cov kua qaub tsis muaj zog yog thim rov qab.
Daim duab 01: Speciation of a Weak Acid (AH is the Weak Acid)
Ib lub kua qaub qaug zog vim qhov tsis tshua muaj polar ntawm cov kua qaub; Yog hais tias lub compound yog ntau dua polar, cov protons tau yooj yim tawm hauv cov kua qaub molecule, tab sis ntawm no, vim hais tias cov compound yog tsawg polar, nws yog ib qho nyuaj rau rhuav tshem cov tshuaj bonds. Qee qhov piv txwv ntawm cov kua qaub tsis muaj zog muaj xws li acetic acid, formic acid, HF acid, hydrogen sulfide, thiab lwm yam.
Dab tsi yog Dilute Acid?
Dilute acid yog cov tshuaj aqueous uas muaj cov kua qaub qis. Qhov ntawd txhais tau tias; cov kua qaub diluted muaj dej ntau dua piv rau cov ntsiab lus acid. Cov kua qaub diluted tuaj yeem yog cov kua qaub tsis muaj zog lossis muaj zog acid. Lo lus "dilute" tsuas yog piav qhia txog qhov concentration ntawm cov kua qaub. Qhov ntxeev ntawm dilute acid yog concentrated acid.
Daim duab 02: Concentrated HCl Acid
Tsis tas li ntawd, peb tuaj yeem dilute cov kua qaub los ntawm kev ntxiv dej ntxiv. Txawm li cas los xij, kev ntxiv dej rau cov concentrated acid yog qhov txaus ntshai. Yog li ntawd, txoj kev nyab xeeb yog ntxiv cov kua qaub rau hauv dej. Diluting acids yog ib qho tseem ceeb heev vim tias kev siv cov kua qaub uas muaj kuab heev tuaj yeem ua rau kub hnyiab heev yog tias nws kov daim tawv nqaij.
Dab tsi yog qhov txawv ntawm Cov Tsis Txaus Siab thiab Dilute Acid?
Tsis muaj kua qaub los ntawm kev faib cov kua qaub raws li cov kua qaub zog, thaum dilute acid los ntawm qeb ntawm cov kua qaub. Qhov sib txawv tseem ceeb ntawm cov kua qaub tsis muaj zog thiab cov kua qaub diluted yog tias cov kua qaub tsis muaj zog yog qhov sib xyaw ua ke uas ib nrab dissociates thaum yaj hauv dej, thaum cov kua qaub diluted yog cov tshuaj muaj dej ntau dua cov kua qaub. Txawm li cas los xij, dilution ntawm cov kua qaub tsis cuam tshuam rau cov kua qaub reactivity. Qhov ntawd txhais tau tias, cov kua qaub muaj zog tsis dhau los ua cov kua qaub tsis muaj zog thaum dilution. Tab sis, tsis muaj zog acids yog tsawg reactive los ntawm xwm.
Hauv qab infographic qhia txog qhov sib txawv ntawm cov kua qaub tsis muaj zog thiab cov kua qaub dilute.
Summary – Weak Acid vs Dilute Acid
Tsis muaj kua qaub los ntawm kev faib cov kua qaub raws li cov kua qaub zog, thiab cov kua qaub dilute los nyob rau hauv qeb ntawm cov concentration ntawm cov kua qaub. Qhov sib txawv tseem ceeb ntawm cov kua qaub tsis muaj zog thiab cov kua qaub diluted yog tias cov kua qaub tsis muaj zog yog cov khoom sib xyaw ua ke uas ib nrab dissociates thaum yaj hauv dej, whereas dilute acid yog cov tshuaj uas muaj dej ntau dua cov kua qaub.
