Experimental measurements of rxn rates. Volume Changes of a Gas eudiometer Volume (mL)...
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Transcript of Experimental measurements of rxn rates. Volume Changes of a Gas eudiometer Volume (mL)...
![Page 1: Experimental measurements of rxn rates. Volume Changes of a Gas eudiometer Volume (mL) 4.05.15.96.87.68.3 Time (s) 01530456075 Zn (s) + 2HCl (aq) → H.](https://reader036.fdocuments.in/reader036/viewer/2022062315/5697bfe91a28abf838cb6be3/html5/thumbnails/1.jpg)
Experimental measurements of rxn rates
![Page 2: Experimental measurements of rxn rates. Volume Changes of a Gas eudiometer Volume (mL) 4.05.15.96.87.68.3 Time (s) 01530456075 Zn (s) + 2HCl (aq) → H.](https://reader036.fdocuments.in/reader036/viewer/2022062315/5697bfe91a28abf838cb6be3/html5/thumbnails/2.jpg)
VolumeChanges of a Gas
eudiometer
Volume (mL) 4.0 5.1 5.9 6.8 7.6 8.3
Time (s) 0 15 30 45 60 75
Zn(s) + 2HCl(aq) → H2(g) + ZnCl2(aq)
![Page 3: Experimental measurements of rxn rates. Volume Changes of a Gas eudiometer Volume (mL) 4.05.15.96.87.68.3 Time (s) 01530456075 Zn (s) + 2HCl (aq) → H.](https://reader036.fdocuments.in/reader036/viewer/2022062315/5697bfe91a28abf838cb6be3/html5/thumbnails/3.jpg)
Rate in mL/s H2
Rate in mol/min for H2
Rate in g/h for HCl
![Page 4: Experimental measurements of rxn rates. Volume Changes of a Gas eudiometer Volume (mL) 4.05.15.96.87.68.3 Time (s) 01530456075 Zn (s) + 2HCl (aq) → H.](https://reader036.fdocuments.in/reader036/viewer/2022062315/5697bfe91a28abf838cb6be3/html5/thumbnails/4.jpg)
15 30 45 60 75 (time sec)
Volume (mL)
87654321
0
Rise:8.3-4 = 4.3
Run: 75-0 = 75
Slope=Rise/Run=4.3/75=0.057 mL/s
![Page 5: Experimental measurements of rxn rates. Volume Changes of a Gas eudiometer Volume (mL) 4.05.15.96.87.68.3 Time (s) 01530456075 Zn (s) + 2HCl (aq) → H.](https://reader036.fdocuments.in/reader036/viewer/2022062315/5697bfe91a28abf838cb6be3/html5/thumbnails/5.jpg)
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
![Page 6: Experimental measurements of rxn rates. Volume Changes of a Gas eudiometer Volume (mL) 4.05.15.96.87.68.3 Time (s) 01530456075 Zn (s) + 2HCl (aq) → H.](https://reader036.fdocuments.in/reader036/viewer/2022062315/5697bfe91a28abf838cb6be3/html5/thumbnails/6.jpg)
If equal MOG, pressure will not change: NO2(g) + CO(g) CO2(g) + NO(g) 2 m.o.g. 2 m.o.g.
![Page 7: Experimental measurements of rxn rates. Volume Changes of a Gas eudiometer Volume (mL) 4.05.15.96.87.68.3 Time (s) 01530456075 Zn (s) + 2HCl (aq) → H.](https://reader036.fdocuments.in/reader036/viewer/2022062315/5697bfe91a28abf838cb6be3/html5/thumbnails/7.jpg)
Mass of an open container {Changes in Mass}
Mass (g) 82.07 81.84 81.71 81.66 81.64 81.63
Time (s) 0 15 30 45 60 75
CaCO3(s) + 2HCl(aq) → CO2(g) + CaCl2(aq) + H2O(l)
![Page 8: Experimental measurements of rxn rates. Volume Changes of a Gas eudiometer Volume (mL) 4.05.15.96.87.68.3 Time (s) 01530456075 Zn (s) + 2HCl (aq) → H.](https://reader036.fdocuments.in/reader036/viewer/2022062315/5697bfe91a28abf838cb6be3/html5/thumbnails/8.jpg)
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 for CaCO3
![Page 9: Experimental measurements of rxn rates. Volume Changes of a Gas eudiometer Volume (mL) 4.05.15.96.87.68.3 Time (s) 01530456075 Zn (s) + 2HCl (aq) → H.](https://reader036.fdocuments.in/reader036/viewer/2022062315/5697bfe91a28abf838cb6be3/html5/thumbnails/9.jpg)
![Page 10: Experimental measurements of rxn rates. Volume Changes of a Gas eudiometer Volume (mL) 4.05.15.96.87.68.3 Time (s) 01530456075 Zn (s) + 2HCl (aq) → H.](https://reader036.fdocuments.in/reader036/viewer/2022062315/5697bfe91a28abf838cb6be3/html5/thumbnails/10.jpg)
![Page 11: Experimental measurements of rxn rates. Volume Changes of a Gas eudiometer Volume (mL) 4.05.15.96.87.68.3 Time (s) 01530456075 Zn (s) + 2HCl (aq) → H.](https://reader036.fdocuments.in/reader036/viewer/2022062315/5697bfe91a28abf838cb6be3/html5/thumbnails/11.jpg)
Hebden p 5 exercises: 7-9 + Page 11 questions