Muaj pes tsawg moles nyob hauv cov kua txiv?
Muaj pes tsawg moles nyob hauv cov kua txiv?

Video: Muaj pes tsawg moles nyob hauv cov kua txiv?

Video: Muaj pes tsawg moles nyob hauv cov kua txiv?
Video: Cov ntseeg siv tshuaj los kho mob & pehawm hauv tuamtsev puas txhaum 2024, Hlis ntuj nqeg
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Qhov ntom ntawm acetic acid yog 1.05 g/cc ntawm qhov kub ib puag ncig, thiab cov pos hniav loj yog 60.05 g/ mol ua . Yog li ntawd nyob rau hauv 20 ml ntawm vinegar , koj yuav muaj (1 x 1.05/60.05) = 0.0175 qab ntawm acetic acid. Tab sis koj tsis tuaj yeem hais " qab ntawm vinegar "vim vinegar tsis yog sib xyaw, nws yog sib xyaw.

Zoo ib yam tuaj yeem nug, qhov sib txawv ntawm 5% kua txiv yog dab tsi?

vinegar yog 5 % acetic acid thiab nws molarity yog 0.833m.

pes tsawg grams nyob hauv ib mole ntawm kua txiv? 60.0520

Ntxiv mus, pes tsawg moles ntawm acetic acid nyob rau hauv cov qauv vinegar?

Qhov no txhais tau tias tus naj npawb ntawm qab ntawm NaOH yuav zoo ib yam li moles ntawm acetic acid , uas txhais tau tias tus naj npawb ntawm moles ntawm acetic acid 25.00 Nws vinegar yog 0.0189 qab.

Kuv yuav xam moles li cas?

  1. Pib nrog tus naj npawb ntawm grams ntawm txhua lub caij, muab rau hauv qhov teeb meem.
  2. Hloov qhov hnyav ntawm txhua lub hauv paus rau moles siv cov molar loj los ntawm cov lus teev tseg.
  3. Faib txhua tus nqi mole los ntawm tus lej tsawg tshaj plaws ntawm moles suav.
  4. Hloov mus rau tus lej ze tshaj plaws. Qhov no yog qhov sib piv ntawm cov ntsiab lus thiab yog.

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