Homework Answers
The observed rotation of the substance also changes (becomes doubled) when the concentration of the unknown sample alone changed by keeping all other parameters constant because the observed rotation is directly proportional to the concentration of the unknown sample.
The observed rotation of the sample is directly proportional to concentration * path length of the polarimeter tube
The specific rotation of the sample for a given substance remains constant when the concentration of the unknown sample alone changed by keeping all other parameters constant because the observed rotation and the concentration of the unknown sample both are changing.
The specific rotation of the sample = observed rotation / (concentration * path length of the polarimeter tube)
since the observed rotation and the concentration of the unknown sample both are changing, there is no change in specific rotation.
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Question 6 (1 point) In your pre-lab, you were asked to determine the concentration for a...
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Equation for question 4: 1/2kx^2+mg*s*sinΘ =
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can
you answerthe lab questions 1-5?
1. Explain why methanol and sodium carbonate were both able to dissolve in water, but only sodium carbonate was able to conduct electricity in solution. (3 pts) 2. Look up the chemical structures of methane and methanol. Based on their structures, which of the two do you expect to be water soluble? Explain your answer. (4 pts) 3. What are the main structural differences and similarities between methanol and 1-decanol. Explain the observed difference...
Equation for question 4: 1/2kx^2+mg*s*sinΘ =
μ*mg*s*cosΘ
Q5. Why can the work done by gravity on a
hanging mass be ignored? (Hint: the masses return to their original
height)
1. If you were to double the mass of the block and cart, what effect would this have on s? 2. If you were to launch a block with m 0.500 kg up a ramp with 0 15o and uk 0.30 with a plunger with k- 200 N/m which compresses by...
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