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Chem Lab > Quiz 1 (Labs 1-4) > Flashcards

Quiz 1 (Labs 1-4) Flashcards

1
Q

Depend on the amount of substance present

A

Extensive Properties

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2
Q

Do not depend on the amount of the substance

A

Intensive Properties

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3
Q

What are some examples of extensive properties?

A

Mass
Volume
Distance
Area
Time

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4
Q

What are some examples of intensive properties?

A

Temperature
Pressure
Density
percentage
concentration

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5
Q

What is the formula for finding density?

A

D=m/v

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6
Q

Define precision

A

a measure of how close multiple measurements of the same item are to each other

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7
Q

Define accuracy

A

Shows how close your measurement is to the accepted or true value.

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8
Q

What is the formula for actual error?

A

Actual error= Experimental value - Accepted value

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9
Q

What is the formula for % error for experiment 2, “Mass and volume relationships”?

A

% error= experimental value- accepted value/accepted value X 100

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10
Q

Process of converting reactants to products

A

Chemical reaction

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11
Q

The outcome of a chemical reaction is called?

A

Products

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12
Q

Products of a chemical reaction are made from other materials called?

A

Reactants

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13
Q

what is the formula for sodium carbonate ?

A

Na2CO3

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14
Q

What is the formula for Potassium nitrate?

A

KNO3

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15
Q

What is the formula for Sodium hydroxide?

A

NaOH

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16
Q

What is the formula for Potassium iodide?

A

Kl

17
Q

What is the formula for Hydrochloric acid?

A

HCl

18
Q

What is the formula for Cobalt (II) chloride?

A

CoCl2

19
Q

What is the formula for Copper (II) nitrate?

A

Cu(NO3)2

20
Q

What is the formula for Silver nitrate?

A

AgNO3

21
Q

What is the formula for Acetic acid?

A

CH3COOH

22
Q

What are some things that can happen during a chemical reaction?

A

Gas production
Temperature change
Color change
Formation of precipitate
Odor change

23
Q

A combination of two or more physically combined substances, not chemically bonded.

A

Mixture

24
Q

the process of separation of liquid from solid and other immiscible liquids, by removing the liquid layer at the top from the layer of solid or liquid below

A

Decantation

25
Q

When the mixture is poured through
the filter, the solid or residue remains
on the filter while the liquid passes
through the filter.

A

Filtration

26
Q

What are two techniques used to separate a mixture?

A

Sublimation & Extraction

27
Q

One component of a mixture is preferentially dissolved in a suitable solvent. The dissolved component in the chosen solvent is removed as part of a
the solution, while the insoluble components remain undissolved.

A

Extraction

28
Q

The transformation process from a solid state to a gas state without passing
through an intermediate liquid phase. (Iodine, carbon dioxide, naphthalene,
and ammonium chloride)

A

Sublimation

29
Q

In experiment 4, what components did you separate?

A

Ammonium chloride, sodium chloride and sand (SiO2)

30
Q

According to the law of conservation:

A

The sum of the masses of the three components should equal the mass of the original sample.

31
Q

In the three separate measurements, the length of the strip of zinc is found to be
(1) 11.3 cm, (2) 11.4 cm, and (3) 11.2 cm. How would you calculate the average?

A

Add all three and divide by the total number of measurements. In this case that would be 3.

32
Q

In the three separate measurements, the length of the strip of zinc is found to be
(1) 11.3 cm, (2) 11.4 cm, and (3) 11.2 cm. How would you calculate the average deviation?

A

Take the average and subtract from each one. Then sum over the absolute values and then divide by the total number of measurements.

33
Q

% of component =

A

mass of component in mixture/ mass of original sample X 100

34
Q

(Law of conservation )
% recovery =

A

mass of matter recovered/ mass of original sample X 100

Chem Lab (2 decks)

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