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Chemistry > exam 1 > Flashcards

exam 1 Flashcards

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1
Q

electrolyte

A

when dissolved in water, they conduct electricity

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2
Q

strong electrolytes

A

dissociates about 100% in water

they conduct well

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3
Q

weak electrolytes

A

they only partially dissociate

only slightly conductive

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4
Q

double headed arrow means?

A

in equilibrium; not fully dissociated

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5
Q

dissociated

A

compound splits into its constituent cations and anions

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6
Q

nonelectrolytes

A

when dissolved in water, they do not conduct electricity

no dissociation at all

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7
Q

what determines whether a substrate is a strong or weak electrolyte (or nonelectrolyte)?

A

% dissociation

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8
Q

solution

A

homogenous mixture of two or more substances (can be any phase)

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9
Q

solute

A

substance present in the smaller amount

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10
Q

solvent

A

substance present in the larger amount

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11
Q

aqueous solution

A

solvent is water; solute is originally liquid or solid

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12
Q

concentration units

A

solute for solvent or solute per solution

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13
Q

parts per million

A

grams of solute per 1,000,000g of solution

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14
Q

parts per billion

A

grams of solute per 1,000,000,000g of solution

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15
Q

molarity

A

how many moles you have per volume (moles/Liter)

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16
Q

millimolar

A

10^-3M or mM

17
Q

micromolar

A

10^ -6M or (micro symbol)M

18
Q

Molarity is always in

A

mols per Liter!!!!!!!!!

19
Q

chemistry

A

study of matter, its composition, structure, and properties

20
Q

matter

A

anything that has mass and occupies space

21
Q

mass

A

defines the quantity of matter

22
Q

what are the two types of matter

A

pure substances and mixtures

23
Q

what is a pure substance

A

same physical and chemical properties all the way through. Can not be separated by physical means

24
Q

what is a mixture

A

composed of two or more substances, can be broken down by physical means

25
Q

two types of a pure substance

A

element, compound

26
Q

two types of a mixture

A

homogenous or heterogenous

27
Q

element definition

A

pure substance that can not be broken down by physical or chemical means and still retain the same properties

28
Q

compound

A

pure substances that are composed of two or more elements combined in definite proportions. CAN be separated by chemical means

29
Q

homogenous mixture

A

everything is distributed evenly

30
Q

heterogenous mixture

A

everything that is mixed can still be seen as separate substances

Chemistry (7 decks)

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