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 58 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
Thanks for the timely response, appreciate it

EAN94

  • Member
  • Posts: 307
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

The Racker and Stoeckenius experiment showing that an H+ electrochemical gradient drives ATP synthes The Racker and Stoeckenius experiment showing that an H+ electrochemical gradient drives ATP synthes
Dynamic Response of Thermometers Experiment Dynamic Response of Thermometers Experiment
How to find the distance of any line segment How to find the distance of any line segment
How to find when Celsius and Fahrenheit are the same temperature How to find when Celsius and Fahrenheit are the same temperature
Find Your Blind Spot Find Your Blind Spot
Someone help me find the x intercepts Someone help me find the x intercepts
Video: Energy Flow - Trophic Levels and Food

For a complete list of videos, visit our video library