## determining viscosity

America Ramirez 3H
Posts: 15
Joined: Wed Sep 30, 2020 9:44 pm

### determining viscosity

How can you determine a liquid has a high viscosity?

Hannah Chang 3E
Posts: 41
Joined: Sat Oct 17, 2020 12:15 am

### Re: determining viscosity

There are different types of viscometers that measure viscosity. You would need to know the flow rate, shear stress, density.....etc in order to calculate.

Susan Chamling 1F
Posts: 41
Joined: Wed Sep 30, 2020 9:42 pm

### Re: determining viscosity

There are multiple methods to measuring a liquid's viscosity, such as measuring the rate at which it flows through a narrow tube. The more viscous the liquid the slower it will flow.

Andrew Wang 1G
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Joined: Wed Sep 30, 2020 10:11 pm
Been upvoted: 2 times

### Re: determining viscosity

From Dr. Lavelle's most recent lecture, we can determine how viscous a substance is compared to another by analyzing their IMFs. The stronger IMF's something has, the more viscous it will be.

Alejandro Gonzalez 2G
Posts: 36
Joined: Wed Sep 30, 2020 10:04 pm

### Re: determining viscosity

I think one way you can determine viscosity is by looking at things like the flow rate (putting it through a viscometer to determine how fast or slow it flows through a tube).

Hasmik Dis 2F
Posts: 44
Joined: Wed Sep 30, 2020 9:50 pm

### Re: determining viscosity

Another tip with viscosity is to compare water and syrup ( I feel that real examples help more). Water of course flows more easily, but syrup has a thicker consistency so it doesn’t flow as smoothly. Syrup is thus more viscous.

Natalie 2F
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Joined: Wed Sep 30, 2020 10:11 pm

### Re: determining viscosity

Without doing an experiment, you can compare viscosities by looking at the IMF's of the substances. If a substance has high IMF's they will be closer together and more viscous. If it has low IMF's, the molecules won't be as attracted to each other and farther apart, so it will be less viscous.

Vanshika Bhushan 3A
Posts: 45
Joined: Wed Sep 30, 2020 9:33 pm

### Re: determining viscosity

Liquids that flow slowly have high viscosities and liquids that flow readily have low viscosities. Liquids whose molecules are polar are usually more viscous than similar nonpolar substances. Liquids with long molecules are invariably very viscous. The viscosity of a liquid decreases as temperature increases.

Caelin Brenninkmeijer 1H
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Joined: Wed Sep 30, 2020 9:50 pm

### Re: determining viscosity

Conceptually, you can determine how high a liquid viscosity is by noticing how easily the substance moves. If it moves slower, you know it has a higher viscosity compared to something that moves relatively easy, like water.

Crystal Hsueh 2I
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Joined: Wed Sep 30, 2020 9:35 pm

### Re: determining viscosity

I'm sure there are a plethora of ways to determine viscosity but in terms of bonds, the stronger the bonds of a liquid, the higher its viscosity.

TrishaP_3E
Posts: 44
Joined: Wed Sep 30, 2020 9:58 pm

### Re: determining viscosity

Yeah I think a general rule is stronger IM forces= higher viscosity. I kind of think of it as the fact that stronger IM forces means that the liquid is closer to being solid and viscous liquids are quite thick and close to solid.

derickngo2k
Posts: 40
Joined: Wed Sep 30, 2020 9:51 pm

### Re: determining viscosit

This depends on the intermolecular forces or IMFs.