1 / 11

Experimental measurements of rxn rates

Experimental measurements of rxn rates. Volume Changes of a Gas eudiometer. Zn (s) + 2HCl (aq) → H 2(g) + ZnCl 2(aq). Rate in mL/s H 2. Rate in mol/min for H 2. Rate in g/h for HCl. Volume (mL). 8 7 6 5 4 3 2 1 0. Rise: 8.3-4 = 4.3. Slope= Rise/Run=

faith
Download Presentation

Experimental measurements of rxn rates

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Experimental measurements of rxn rates

  2. Volume Changes of a Gas eudiometer Zn(s) + 2HCl(aq) → H2(g) + ZnCl2(aq)

  3. Rate in mL/s H2 Rate in mol/min for H2 Rate in g/h for HCl

  4. Volume (mL) 8 7 6 5 4 3 2 1 0 Rise: 8.3-4 = 4.3 Slope= Rise/Run= 4.3/75= 0.057 mL/s Run: 75-0 = 75 15 30 45 60 75 (time sec)

  5. Changes in Pressure (constant volume or sealed container) • if more moles of gas (coefficient) in products, pressure will go up Zn(s) + 2HCl(aq)  H2(g) + ZnCl2(aq) ____m.o.g. ____ m.o.g. • If more MOG in reactants, pressure will __________________________ • rate = ∆ pressure (constant volume) ∆ time 

  6. If equal MOG, pressure will not change:  NO2(g) + CO(g)  CO2(g) + NO(g) 2 m.o.g. 2 m.o.g.

  7. Mass of an open container {Changes in Mass} CaCO3(s) + 2HCl(aq) → CO2(g) + CaCl2(aq) + H2O(l)

  8. CaCO3(s) + 2HCl(aq) → CO2(g) + CaCl2(aq) + H2O(l) 1. Calculate the rate in units of grams/s for CO2 2. Calculate the rate in grams/h forCaCO3

  9. Hebden p 5 exercises: 7-9 + Page 11 questions

More Related