Videos

Molality and Colligative Properties Video Lesson

Added Mar 24, 2015 •

Copy this URL:
Embed code:	<iframe class="edlio-embed-player" type="text/html" width="640" height="360" src="//dbhs.wvusd.org/apps/embed/?v=76485" frameborder="0" allowfullscreen></iframe> Change dimensions

Show Transcript

so we're going to talk about please property the property I want  different type of concentration we use morality is molarity molality molality and Define sonogram and the from Malawi Malawi not affected by temperature volume of a liquid change the temperature from Richmond temperature  so something to keep in mind for the solvent and if we measure out water in a graduated cylinder and we measure and calculate the map the density of water is 1.00 grams per milliliter and then you can get from grams to kilograms to get the Robux equation to you so take a look at where your property so I clean the property depends on the number of particles that we have not physically so if my is sodium chloride in water dissolve into sodium ions and I am so there to particle  that are produced when starting car pictures of water if I have sea salt in a tailpipe and crawled into one one calcium ion into chlorine ions dissolve into three particles equation for  so there are four Clues properties that we're going to be looking at boiling point elevation freezing point depression vapor pressure lowering and osmotic pressure those are the four main ones we will be focusing on the one elevation occurs when  the bubble that are for sing in water when it boils or blocked by particles and in order to atmospheric pressure we need more energy or more and what this does so here's the equation for the boiling point elevation to determine boiling point elevation Delta TV KB is a costume that you can find on page 921 into 12 already I have the number of particles and the Apple name can you make that in some reading in your broke or another but it's represented by the letter i the property is freezing point depression and what here is as the particles are becoming together for the solvent molecules in cursive those are interfering with that and it interferes with those intermolecular forces and the bonds between the molecule the weekend the 4th repeat if it were just appear before temperature where is on the road temperature in current in our cars to help keep our engine cool some for from overheating freezing glycol with antifreeze  lowers the freezing point of water for it rated see any snow pants and help with making ice cream and we will be number can I pay later on in the chapter also just a couple things change change change KFC 21 and I'm the number of the particle  so I'm going to go over and Sample with you for wanting point and freezing point and the freezing point of the 0.029 from molarity with sweating point elevation so remember equation is winning points equals the number 34 time the boiling point for water water so how to TV the water is 0.512 degrees time for molarity arbitration similarity and dope TV 0 degrees Celsius to find the new boiling point what I'm going to do with a pad the normal boiling point for the normal boiling point is 100 degrees Celsius boiling point elevation going to add  the value that I calculated for Delta TV is my new free point temperature 100.030 degrees Celsius raise the boiling point by .03  how to calculate freezing point depression and pretty much shoes but my shoe  the freezing point for water which is 1.8 Time Station and I get 0.113 Celsius till for free compression I'm going to try my freezing point depression from the normal freezing point and water from normally freezes at 0 degrees my name is zero zero point 0.11 and we can do if I know the freezing point depression to calculate the molality if I know how much salt is in there I can use to razor very very very helpful equation to know and you guys will have a chance to work on the worksheets so the 3rd calida property vapor pressure lowering and will you remember that they pressure is that pressure just above the liquid of the solution right here from the solvent particles escaping vapor pressure right above it if there's particle in the solution it's going to Sparkle from escaping from the liquid state what does lower part of the lower pressure and again the number of particles the more particles have the more vapor pressure is lowered pressure have to do with pressure compared to a solution and pure solvent and what happened to those boots event passes through a membrane and what can I open is just going to move towards the solution through a membrane what we call a pressure have to do any calculations my pressure just I just want to know if you have right here on the outside it's Sheriff's Office and made of a semipermeable membrane and happen over time is the the concentrated solution is going to move from beat the set the entire sequence am I from Uncle membrane into the volume of the and the difference between the level of the level of the next Solutions the operative is equal to the osmotic pressure  and our blood work on the theory of us osmosis that is osmotic pressure including property calculation freezing point depression and boiling point elevation those are the shoes ones that you will want to now must be pretty **** again pressure facing pressure calculator bring any notes you took

Uploaded by Teresa Hebert.