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Matter Deck 1 > Deck 3 > Flashcards

Deck 3 Flashcards

1
Q

What is a solution?

A

A homogeneous mixture where one substance has been dissolved in another substance

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2
Q

Is a solution a homogeneous or heterogeneous mixture?

A

homogeneous mixture

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3
Q

In a solution, what is the name for the substance being dissolved?

A

Solute

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4
Q

In a solution, what is the substance called in which the solute is dissolved?

A

Solvent

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5
Q

Why can more salt be dissolved in hot water that in cold water?

A

B/c when a liquid is warmed, its molecules move more quickly and that will dissolve the salt more quickly

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6
Q

If you want sweet iced tea, would it be better to add the sugar before or after you cool the tea?

A

Before you cool the tea

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7
Q

What is a suspension?

A

A mixture in while one or more substances are immiscible

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8
Q

What does immiscible mean?

A

It means the one substance won’t mix with another (Water/oil)

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9
Q

What is an emulsifier?

A

A substance that helps to keep particles in suspension

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10
Q

What is a colloid?

A

A suspension with very tiny particles suspended in it

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11
Q

What would happen to the mayonnaise if the egg yolk were left out of the recipe?

A

Then mayonnaise would begin to get chunky

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12
Q

How is a suspension different from a true solution?

A

True solutions are homogeneous mixtures while suspensions are heterogeneous mixtures

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13
Q

What is solubility?

A

The measure of how much solute can be dissolved in a given amount of solvent

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14
Q

What are the three factors that most affect solubility?

A

Temperature, pressure, polarity

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15
Q

What is Precipitate?

A

The name given to particles that come out of a saturated solution

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16
Q

Why are soft drinks canned or bottles at low temps and high pressures?

A

So that there will be more fizz

17
Q

Why do soft drinks eventually go flat once opened?

A

B/c gas escapes through the opening

18
Q

If no additional sugar has been added to a saturated solution of sugar water, what can you conclude about the temp and/or pressure if you notice sugar beginning to settle on the bottom of the cup?

A

It is saturated b/c the water cannot dissolve any more of the sugar; The temp dropped

19
Q

What are the main ingredients of soft drinks?

A

Water, corn syrup, carbonation

20
Q

What is the most popular drink in the United States? The second most popular?

A

Water, soda

21
Q

What are the two most popular sweeteners used in soft drinks?

A

Corn syrup, aspartame

22
Q

Why are recipes for soft drinks considered top secret?

A

So that no other company can copy the recipe

23
Q

What is a dilute solution?

A

A solution when there is a small amount of solute in it

24
Q

What is a concentrated solution?

A

If a solution has a large amount of solute in it

25
Q

How does the concentration of a solution affect its boiling point?

A

When you increase the concentration, you increase the boiling point

26
Q

How does the concentration of a solution affect its freezing point?

A

When you decrease the concentration, you decrease the freezing point

27
Q

Why is a quantitative observation for concentration usually more useful than a qualitative observation?

A

B/c a quantitative observation is necessary to enable scientists to be able to repeat results of experiments

28
Q

What is the most common solution on Earth?

A

Seawater

29
Q

What are the main substances found in the ocean besides water?

A

magnesium, bromine, sodium, chloride

30
Q

How does salt get into the ocean?

A

When it rains, water falls onto the surface of the earth, the water dissolves many minerals that are found on the ground which get carried into the ocean by streams, rivers etc….

31
Q

Name one gas that is dissolved in the ocean water.

A

oxygen

32
Q

Why is seawater saltier than water in rivers and lakes?

A

b/c seawater has salt in it

Matter Deck 1 (3 decks)

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