Cov txheej txheem:

Yuav ua li cas hloov ppm rau moles?
Yuav ua li cas hloov ppm rau moles?

Video: Yuav ua li cas hloov ppm rau moles?

Video: Yuav ua li cas hloov ppm rau moles?
Video: yuav coj li cas kom luag nyiam 2024, Kaum ib hlis
Anonim

Kev piav qhia:

  1. Hloov milligram mus grams. 28.85 mg 1 L × 1 g 1000 mg = 0.028 85 g / L.
  2. Hloov grams rau moles . Ntawm no, peb yuav tsum paub cov molar loj ntawm cov kua. Xav tias cov kua dej yog sodium chloride (Mr = 58.44). Tom qab ntawd, koj faib los ntawm molar pawg. 0.028 85g 1L × 1 mol 58.44g = 4.94 x 10-3 mol /L. Teb txuas.

Tsis tas li ntawd, yuav ua li cas koj hloov los ntawm grams rau moles?

Hloov ua Grams rau Moles

  1. Kauj Ruam 1: Nrhiav Molecular Luj. Peb twb paub tus naj npawb ntawm cov grams, yog li tshwj tsis yog nws twb tau muab, peb yuav tsum nrhiav qhov hnyav molecular ntawm cov tshuaj.
  2. Kauj Ruam 2: Faib tus nqi ntawm cov Compound hauv Grams los ntawm Molecular Luj. Tam sim no peb tuaj yeem hloov 100g ntawm NaOH rau moles.

Ib sab saum toj no, Mole ppm yog dab tsi? Parts per million - ppm ua - feem ntau yog siv los ntsuas qhov loj me me (concentrations) ntawm cov pa phem hauv huab cua, dej, cov kua hauv lub cev, thiab lwm yam. Qhov ib lab yog cov molar loj, ntim lossis loj piv ntawm cov pa phem thiab cov tshuaj. ppm ua yog txhais raws li. ppm ua = 1,000,000 c/s. = 106 c / s (1)

Tsis tas li, kuv yuav xam ppm li cas?

Parts per Million (ppm) Kev Ntsuas Kev Ntsuas

  1. Sau ib qho kev sib npaug sawv cev rau ppm concentration: ppm = mass solute (mg) ÷ volume solution (L)
  2. Extract cov ntaub ntawv los ntawm cov lus nug: loj solute (NaCl) = 0.0045 g.
  3. Hloov cov huab hwm coj hauv grams mus rau qhov hnyav hauv milligrams: pawg NaCl = 0.0045 g = 0.0045 g × 1000 mg / g = 4.5 mg.

Cov units ntawm ppm yog dab tsi?

Qhov no yog ib qho luv luv rau " ntu ib lab "thiab nws kuj tuaj yeem qhia tau li milligrams ib litre (mg / L). Qhov kev ntsuas no yog qhov loj ntawm cov tshuaj lom neeg los yog paug rau ib chav tsev ntim dej.

Pom zoo: