Name Date Experiment #3 Pre-lab Assignment (page 2 of 2) 2. In the lab a student
ID: 592080 • Letter: N
Question
Name Date Experiment #3 Pre-lab Assignment (page 2 of 2) 2. In the lab a student calculated the average rate a bead travelled through mineral oil, olive olil, propylene glycol, and glycerol. List in order the following liquids from least viscous to most viscous (1-4) based on the students data. Least viscous is 1 and most viscous is 4. a. Mineral oil b. Propylene glycol c. Glycerol d. Olive oil 42.5 mm/sec 7.32 cm/sec 126.4 mm/min 68.40 cm/min 3. Write a balanced chemical equation for the double replacement reactions listed below. Use the solubility rules in the Introduction section of this experiment to predict whether this is a precipitation reaction and a solid is formed. For full credit, include the states of matter in the balanced chemical equation. If there is no reaction, write NR after the arrow. _-Pb(NO3)2(aq) NOsh(aq)Nal(ag) a. b. KNO3(aq) +--NaCOs(aq) c.--AgNO3(aq) + NaOH(aq)- d. Page 11 of 18 Rev F2017Explanation / Answer
the faster the velocity --> The least viscous
then
use m/s
a)
42.5*10^-3 m/s = 0.425 m/s
b)
0.0732 m/s
c)
0.1264 m/min -- 0.1264 m/m * 1 m/60 s = 0.002 m/s
d)
0.684 m/min * 1 / 60 = 0.011 m/s
then
d < c < b < a
most viscous -- > lest viscous
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