quantitative chem Flashcards

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1
Q

avogadros constant

A

6.02 x 10^23

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2
Q

molar mass

A

the mass in grams of one mole of that substance

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3
Q

solution

A

a homogeneous mixture of solute and solvent

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4
Q

solute

A

substance that is dissolved in the solution

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5
Q

solvent

A

the substance in which another substance is dissolved in, forming a solution

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6
Q

molar concentration

A

the amount of solute per unit volume of solution

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7
Q

% yield

A

measure of the extent of a reaction
actual/theoretical x100

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8
Q

molar volume

A

general constant for gas
volume in dm^3 of one mole of any gas at STP
22.4

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9
Q

what happens during dilution

A

(volume addition)
no. of moles stays same
volume of soln increases

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10
Q

what happens during mixing

A

(mole+volume addition)
no. of moles of common particle increases
total volume increases

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11
Q

what happens when diff ions mixed together

A

moles of each ion species in mixture must be determined separately (dissociation)

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12
Q

synthesis reaction

A

2 simple substances combine to form a complex product

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13
Q

decomposition reaction

A

1 reactant produces 2 or more products

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14
Q

dissolution

A

solid placed in water breaks down into smaller particles surrounded by water molecules

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15
Q

dissociation

A

ionic salt further broken down into anions + cations in water

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16
Q

electrolysis

A

look at 1/2 reactions at pos+neg electrodes

17
Q

ion exchange reaction

A

2 aqueous ionic solutions mixed, cations exchange respective anions (AB + CD—> AD + BC)

18
Q

stoichiometric ratio

A

ratio of chemical substances necessary for a reaction to occur completely

19
Q

purity

A

measure of the amount of impurities found in a chemical space

20
Q

neutralisation

A

point where an acid + base have reacted so neither is in excess