Dab tsi yog qhov melting point ntawm benzoic acid uas koj txiav txim siab?
Dab tsi yog qhov melting point ntawm benzoic acid uas koj txiav txim siab?

Video: Dab tsi yog qhov melting point ntawm benzoic acid uas koj txiav txim siab?

Video: Dab tsi yog qhov melting point ntawm benzoic acid uas koj txiav txim siab?
Video: Xwm Kab Yog Dab Tsi?: Hmoob Nkag Siab Yuam Kev Tag Lawm 2024, Kaum ib hlis
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Cov melting point ntawm benzoic acid yog 122.4 degree Celsius. 1. To txiav txim tus melting point ntawm benzoic acid , kom paub tseeb tias melting point ntaus ntawv nyob ze rau chav kub ua ntej pib a melting point tsom xam.

Tsis tas li ntawd, vim li cas benzoic acid thiaj li melting point?

Yog vim li cas melting point ntawm impure benzoic acid yog siab dua tshaj qhov uas dawb huv benzoic acid ? Feem ntau cov melting point ntawm ntshiab compound yuav tsum siab dua tshaj qhov tsis huv, vim hais tias cov impurities messes ntawm crystalline lattice los ntawm thaiv lawv tsim thiab tsim irregularities.

Ib yam li ntawd, qhov melting point ntawm impure benzoic acid yog dab tsi? Piv txwv li, ntshiab benzoic acid muaj ib melting point Qhov kub ntawm 121-123 ° C. Yog tshuaj benzoic tau kis nrog ib tug impurity, lub melting point Qhov ntau yuav txo qis thiab dav mus rau 117-120 ° C.

Ntawm no, dab tsi yog qhov lees paub cov ntaub ntawv tus nqi rau lub melting point ntawm benzoic acid?

Benzoic acid Cov khoom Melting point Kub: 121-125 ° C ( lit .) Boiling point Qhov kub thiab txias: 249 ° C lit .) Qhov ceev 1.08 vapor ceev 4.21 (vs huab cua)

Puas yog benzoic acid polar lossis nonpolar?

Qhov laj thawj benzoic acid dissolves me ntsis hauv dej txias yog tias, txawm tias carboxylic kua qaub pab pawg yog polar , feem ntau ntawm cov benzoic acid molecule yog tsis polar (dej yog polar ). Nws tsuas yog pawg carboxylic uas yog polar.

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