This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: You open your laboratory drawer to prepare your glassware for an experiment. You find that your ... (Read 54 times)

Yolanda

  • Hero Member
  • *****
  • Posts: 757
on: Aug 23, 2018

You open your laboratory drawer to prepare your glassware for an experiment. You find that
  your round-bottom flask is attached so firmly to your distillation adapter that you cannot take
  them apart.
  (a) What should you have done when storing your glassware during the previous lab period?
  (b) How can you get the two pieces of glassware apart?



Question 2

Many student laboratories employ heating mantles for heating reaction mixtures. These
  devices should not be plugged directly into the electrical outlet. Why?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jesse.fleming

  • Sr. Member
  • ****
  • Posts: 301
Reply #1 on: Aug 23, 2018
Answer to Question 1

(a) Taken it apart.
(b) Hot water, a gentle rap on the bench top.



Answer to Question 2

Heating mantles are not designed to operate at 110 volts. Instead, the mantle is plugged into a
variable transformer which is used to adjust the voltage and thus the temperature.
(a) CH3CO2H + NaOH
(b) H2NCH2CH2CH2NH2 + HCl (12 M)
CH
3CO2Na + H2O
ClH
3NCH2CH2CH2NH3Cl
+ +
25.0 g 10.0 g
5.0 g 10.0 mL
14 You open your laboratory drawer to prepare your glassware for an experiment. You find tha



Yolanda

  • Member
  • Posts: 757
Reply 2 on: Aug 23, 2018
Wow, this really help

zacnyjessica

  • Member
  • Posts: 345
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Siamese Crocodile sleeping with its mouth open to pant Siamese Crocodile sleeping with its mouth open to pant
Monitoring and Following Up on Laboratory Test Results Monitoring and Following Up on Laboratory Test Results
Basic Design of the Driving and Cell Phone Distraction Experiment Basic Design of the Driving and Cell Phone Distraction Experiment
A Mental Model of the Craftsman Experiment A Mental Model of the Craftsman Experiment
Find the derivative using the product rule Find the derivative using the product rule
Find derivative using quotient rule Find derivative using quotient rule
Video: Nucleic acid digestion -small intestine

For a complete list of videos, visit our video library