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 69 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
Gracias!

jamesnevil303

  • Member
  • Posts: 337
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

BMB 212 Experiment 6 BMB 212 Experiment 6
Forms of primary adult glaucoma: (a) in chronic open-angle glaucoma, the anterior chamber angle rema Forms of primary adult glaucoma: (a) in chronic open-angle glaucoma, the anterior chamber angle rema
In 2013, Americans learned that the federal government massively surveys their phone calls and e-mai In 2013, Americans learned that the federal government massively surveys their phone calls and e-mai
To test the normally open contacts, connect one meter lead to terminal 30 and the other lead to ... To test the normally open contacts, connect one meter lead to terminal 30 and the other lead to ...
How to find the distance of any line segment How to find the distance of any line segment
Visual Cliff Experiment Visual Cliff Experiment
Video: Role of complement proteins

For a complete list of videos, visit our video library