March 28, 2024, 01:00:29 PM
Forum Rules: Read This Before Posting


Topic: water  (Read 7966 times)

0 Members and 1 Guest are viewing this topic.

Offline xiankai

  • Chemist
  • Full Member
  • *
  • Posts: 785
  • Mole Snacks: +77/-37
  • Gender: Male
water
« on: August 17, 2005, 08:12:03 AM »
why does water always stick to containers? its near impossible to shake it off. no amtter how hard u pour, there is always water left in the container
one learns best by teaching

Offline ATMyller

  • Chemist
  • Full Member
  • *
  • Posts: 223
  • Mole Snacks: +31/-6
Re:water
« Reply #1 on: August 18, 2005, 04:16:20 AM »
With small amounts of water (droplets etc.) the force of surface tension is greater than gravitational pull or forces you manage to induce with shaking.
Chemists do it periodically on table.

Offline xiankai

  • Chemist
  • Full Member
  • *
  • Posts: 785
  • Mole Snacks: +77/-37
  • Gender: Male
Re:water
« Reply #2 on: August 18, 2005, 04:34:19 AM »
what is surface tension? in which direction does it act?
one learns best by teaching

Offline Mitch

  • General Chemist
  • Administrator
  • Sr. Member
  • *
  • Posts: 5298
  • Mole Snacks: +376/-3
  • Gender: Male
  • "I bring you peace." -Mr. Burns
    • Chemistry Blog
Re:water
« Reply #3 on: August 18, 2005, 05:30:24 AM »
Also look into the chemical property of adhesion.
Most Common Suggestions I Make on the Forums.
1. Start by writing a balanced chemical equation.
2. Don't confuse thermodynamic stability with chemical reactivity.
3. Forum Supports LaTex

Offline xiankai

  • Chemist
  • Full Member
  • *
  • Posts: 785
  • Mole Snacks: +77/-37
  • Gender: Male
Re:water
« Reply #4 on: August 19, 2005, 01:50:30 AM »
what kind of adhesion is it? i dont think water adheres to the container chemically, yet there also doesnt seem to be a physical force  ???
one learns best by teaching

Offline Donaldson Tan

  • Editor, New Asia Republic
  • Retired Staff
  • Sr. Member
  • *
  • Posts: 3177
  • Mole Snacks: +261/-13
  • Gender: Male
    • New Asia Republic
Re:water
« Reply #5 on: September 01, 2005, 12:21:20 AM »
it's a type of intermolecular bonding, between water molecules and the container surface
"Say you're in a [chemical] plant and there's a snake on the floor. What are you going to do? Call a consultant? Get a meeting together to talk about which color is the snake? Employees should do one thing: walk over there and you step on the friggin� snake." - Jean-Pierre Garnier, CEO of Glaxosmithkline, June 2006

Blueshawk

  • Guest
Re:water
« Reply #6 on: September 01, 2005, 12:30:07 AM »
the capillary effect is based on water-surface interaction.

its is in part due to the polar nature of water

EDIT: spellcheck
« Last Edit: September 01, 2005, 12:30:53 AM by Blueshawk »

Offline Mitch

  • General Chemist
  • Administrator
  • Sr. Member
  • *
  • Posts: 5298
  • Mole Snacks: +376/-3
  • Gender: Male
  • "I bring you peace." -Mr. Burns
    • Chemistry Blog
Re:water
« Reply #7 on: September 01, 2005, 01:12:58 AM »
There is no capillary action involved on large surfaces like a cup or container. It will be do to the macroscopic concept of adhesion described on the molecular level by Geodome.
Most Common Suggestions I Make on the Forums.
1. Start by writing a balanced chemical equation.
2. Don't confuse thermodynamic stability with chemical reactivity.
3. Forum Supports LaTex

Offline xiankai

  • Chemist
  • Full Member
  • *
  • Posts: 785
  • Mole Snacks: +77/-37
  • Gender: Male
Re:water
« Reply #8 on: September 01, 2005, 03:50:02 AM »
is that kind of intermolecular bonding covalent? (making a guess... i dont really know much about these stuff)
one learns best by teaching

Sponsored Links