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 30 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
:D TYSM

meow1234

  • Member
  • Posts: 333
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

An example of an EHR screen used to order a laboratory test. An example of an EHR screen used to order a laboratory test.
Balloon angioplasty is used to open coronary vessels. Balloon angioplasty is used to open coronary vessels.
How to find the slope of a line using any two points How to find the slope of a line using any two points
How to find the components of a vector found in the first quadrant How to find the components of a vector found in the first quadrant
The Milgram Obedience Experiment The Milgram Obedience Experiment
Monkey Experiment: Sense of Fairness Monkey Experiment: Sense of Fairness
Video: Protein catabolism - deamination

For a complete list of videos, visit our video library