November 26, 2024, 12:41:28 AM
Forum Rules: Read This Before Posting


Topic: Lab due tomorrow. First day of summer class. Driving me mad!  (Read 7334 times)

0 Members and 1 Guest are viewing this topic.

Offline Cop J

  • New Member
  • **
  • Posts: 6
  • Mole Snacks: +0/-3
Well I have done this whole lab, took me about 3 hours. Now I am stuck on the last part of it. I have gotten some of it but I just can't figure the rest out. If possible can someone here help?

Problems:
Given the following pycnometer data:         Pycnometer is the flask and a one hole rubber stopper.

    * Weight of the water filled flask and stopper...     60.2555 g
    * Density of water used in experiment....     0.9932 g/cc
    * Weight of the flask, solid, and stopper....     132.0768 g
    * Weight of the EMPTY flask and stopper...     33.2351 g
    * Weight of the flask, solid, stopper, and water..     140.2725 g

CALCULATE:   
The WEIGHT of solid used   _______________ (e)
The VOLUME contained by the flask
enter (f) to 3 decimal places   _______________ (f)
The volume of water needed to fill the flask when the SOLID is in the flask
enter (g) to 3 decimal places    _______________ (g)
The VOLUME of the SOLID   _______________ (h)
The DENSITY of the SOLID   _______________ (i)

So far I got:

e = 98.8417 g
f = 27.205 cc

g, h, and i are killing me. Please if someone can offer some help that would greatly be appreciated!

Offline Cop J

  • New Member
  • **
  • Posts: 6
  • Mole Snacks: +0/-3
Re: Lab due tomorrow. First day of summer class. Driving me mad!
« Reply #1 on: May 27, 2008, 11:25:31 PM »
g = 8.251

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27864
  • Mole Snacks: +1813/-412
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Lab due tomorrow. First day of summer class. Driving me mad!
« Reply #2 on: May 28, 2008, 03:11:44 AM »
Now that you know f & g, h should be obvious.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline Cop J

  • New Member
  • **
  • Posts: 6
  • Mole Snacks: +0/-3
Re: Lab due tomorrow. First day of summer class. Driving me mad!
« Reply #3 on: May 28, 2008, 02:02:32 PM »
Can you help me with it? I can't seem to figure it out.

Offline Cop J

  • New Member
  • **
  • Posts: 6
  • Mole Snacks: +0/-3
Re: Lab due tomorrow. First day of summer class. Driving me mad!
« Reply #4 on: May 28, 2008, 10:02:28 PM »
I really need help with this. Teacher gave another day extension. I need help please.   ???

Offline Gerard

  • Full Member
  • ****
  • Posts: 196
  • Mole Snacks: +13/-13
  • Gender: Male
  • "pressure makes diamond"
Re: Lab due tomorrow. First day of summer class. Driving me mad!
« Reply #5 on: May 29, 2008, 10:52:25 AM »
Well I have done this whole lab, took me about 3 hours. Now I am stuck on the last part of it. I have gotten some of it but I just can't figure the rest out. If possible can someone here help?

Problems:
Given the following pycnometer data:         Pycnometer is the flask and a one hole rubber stopper.

    * Weight of the water filled flask and stopper...     60.2555 g
    * Density of water used in experiment....     0.9932 g/cc
    * Weight of the flask, solid, and stopper....     132.0768 g
    * Weight of the EMPTY flask and stopper...     33.2351 g
    * Weight of the flask, solid, stopper, and water..     140.2725 g

CALCULATE:   
The WEIGHT of solid used   _______________ (e)
The VOLUME contained by the flask
enter (f) to 3 decimal places   _______________ (f)
The volume of water needed to fill the flask when the SOLID is in the flask
enter (g) to 3 decimal places    _______________ (g)
The VOLUME of the SOLID   _______________ (h)
The DENSITY of the SOLID   _______________ (i)

So far I got:

e = 98.8417 g
f = 27.205 cc

g, h, and i are killing me. Please if someone can offer some help that would greatly be appreciated!
for letter g,solve for the mass of water when the flask is with solid,stopper and water then divide it by the density of the water
for letter h, first solve for the original volume of the water by dividing the original wieght of the water by its density then whatever you got from this you deduct it from letter g
for letter i, divide the mass of the solid by the volume calculated....
"Charles! Charles! That's it Mr. Charles Darwin get out of this room, I told you once and I told you twice not to tease your fellow Mr. Arrhenius!"

Sponsored Links