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ACT Aspire Science: Crystal Diffusion 0 Views


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Description:

A student places the two crystals in cold water. Will the reaction take place faster or slower than if the student had used warm water?


Transcript

00:00

Yeah Oh okay Aspiring people More weird signs for you

00:07

Here we go Here's the frame when walking into a

00:10

warm building from the cold outside you're greeted with a

00:13

blast of warm air No that's soothing Warm air was

00:16

acting to balance with the cold air outside Well this

00:20

is one of the universe's irreversible process is across the

00:25

universe Things are becoming more and more disordered That means

00:29

that over time the variations in the physical properties of

00:32

the universe such as temperature pressure and chemistry are moving

00:35

towards a state of balance Well the intermingling of the

00:39

warm and cold air in the example above is a

00:42

type of diffusion Yeah that's what diffusion is Well students

00:46

are tasked with carrying out a series of experiments involving

00:50

diffusion in liquids they're given to different white crystals One

00:54

made up of lead nitrate That's P b n o

00:57

three there and one made up of potassium iodide K

01:00

I Well the students placed the crystals in a dish

01:03

filled with water A reaction occurs that causes the lead

01:06

and the potassium to switch places Yeah like that movie

01:10

with those earning that orange haired girl All right well

01:14

let atoms are more massive than potassium Adams and move

01:17

more slowly at the same temperature You have a hot

01:20

in the water The faster the crystals dissolve and the

01:23

faster the reaction larger the volume all the longer it

01:26

takes to complete diffusion Okay moving on a student places

01:31

the two crystals in cold water Will the reaction take

01:35

place faster or slower than if the student had used

01:39

warm water Faster or slower Cold water well We've been

01:45

placing a French book under our pillows at night in

01:48

hopes that we'll learn through osmosis But no it ain't

01:51

working Salon Marche pas certain friends Well maybe we need

01:56

to learn something about the process of diffusion first Well

01:59

the description above says that the hotter the water the

02:02

faster the crystals dissolved and the faster the reaction Yeah

02:07

Then they dissolved his reaction So we can infer that

02:09

cold water the opposite will slow down the rate at

02:13

which the reaction takes place Duck Our reactions are slower

02:17

when it's cold too But that may be from all

02:20

the layers of clothing we have on Yeah so the

02:23

answer to our French problem might be a heated waterbed

02:27

about that All right now Well for this problem the

02:29

answer just be slower and we're clearly getting that way 00:02:33.74 --> [endTime] in our old age

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