pla Flashcards

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1
Q

Define fluid:

A

A liquid or a gas with no set shape

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2
Q

What are hazard symbols? What do the different shapes represent?

A

A warning symbol on hazardous materials:
Yellow triangle = caution
Orange diamond = warning
Red octagon = danger

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3
Q

What are WHMIS symbols?

A

Workplace Hazardous Materials Information System

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4
Q

Define “slurry” and provide an example.

A

A mix of liquid and solid (mud)

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5
Q

Define pure substance and provide an example.

A

A substance made up of only one thing (water)

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6
Q

Define mixture and provide an example.

A

2 or more pure substances mixed together

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7
Q

Heterogeneous mixtures:

A

Mechanical mixture which all the substances are easy to see.

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8
Q

Suspensions:

A

A cloudy mixture with Pisces from one substance that stays in the middle of another substance it normally separates(mud)

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9
Q

Colloids:

A

Cloudy mixture where everything is too small to separate(milk)

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10
Q

Homogenous mixtures:

A

A mixture that looks like its only one substance or solution

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11
Q

Solutions

A

homogeneous mixture

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12
Q

What is paper chromatography and why is it useful?

A

If the substance you are testing is not pure it will separate but if it’s sure there will be no separation

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13
Q

Define solute and solvent and provide an example of each.

A

The solute is a substance that dissolves into the solvent (Koolaid powder and water)

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14
Q

What is concentration?

A

The amount of solute

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15
Q

Which has a higher concentration: 10g of salt in 25mL or water OR 15g of salt in 100mL of water?

A

10 in 25

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16
Q

Describe the difference between diluted and concentrated solutions.

A

Diluted=has small amount of solute

Concentrated= has a large amount of solute

17
Q

Define solubility.

A

Ability to dissolve mass of solute

18
Q

What three factors affect solubility?

A

Temperature, type of solute, type of solvent

19
Q

Describe the difference between saturated and unsaturated solutions.

A

saturated=no more solute can be dissolved at a given temperature
Unsaturated= you can still add more solute

20
Q

Define saturation point.

A

The max amount of solute that can be dissolved

21
Q

What does insolubility mean?

A

When the substance won’t dissolve in the solvent

22
Q

What is thermal pollution and why is it an issue?

A

When warm water goes into the cold river

23
Q

Define the particle model of matter and list its four main properties.

A

It explains the behaviour of solids liquids and gasses
Four main properties are:
All matter is made up of particles
Tiny particles are always moving and vibrating
May be attracted or bonding together
Have spaces between them

24
Q

What factors affect the rate of dissolving?

A

size of particles, amount of stiring and temp