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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?
A student is trying to write down the reaction for the lead and potassium switching. Which of the following is the best answer?
A student wants to see the effect that the size of the dish has on the experiment. She places two crystals each in a separate small dish and two in...
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
Full Transcript
- 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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