Chapter 1: Measurements

Question 1

length base unit

Answer 1

meter

Question 2

what is the base unit for mass

Answer 2

kilogram

Question 3

what is the base unit for time

Answer 3

seconds

Question 4

what is the base unit for temperature

Answer 4

kelvin

Question 5

amount of a substance

Answer 5

mole

Question 6

what is the base unit for electric current

Answer 6

ampere

Question 7

tera

Answer 7

10^12

Question 8

giga

Answer 8

10^9

Question 9

what is mega

Answer 9

10^6

Question 10

kilo

Answer 10

10^3

Question 11

hecto

Answer 11

10^2

Question 12

deca

Answer 12

10^1

Question 13

deci

Answer 13

10^-1

Question 14

centi

Answer 14

10^2

Question 15

mili

Answer 15

10^-3

Question 16

micro

Answer 16

10^-6

Question 17

nano

Answer 17

10^-9

Question 18

pico

Answer 18

10^12

Question 19

what is a solution

Answer 19

a homoegenous mixture of two or more substances

Question 20

what is a solute

Answer 20

a minor species in solution

Question 21

what is the solvent

Answer 21

the major species in the solution

Question 22

what is a mole

Answer 22

avogadro;s number of particles

Question 23

what is the formula mass

Answer 23

“molar mass of a strong electrolyte

Question 24

what is molarity

Answer 24

mol/L

Question 25

what is molality (m)

Answer 25

mol/Kg

Question 26

what is an electrolyte

Answer 26

a substance that disocciates into ions

Question 27

what is a strong/weak electrolyte

Answer 27

strong- mostly dissociates into ions
weak-partially dissociates

Question 28

what is the formal concentration (F)

Answer 28

the molarity of a substance if it were not converted into the other species in a solution

Question 29

formula for weight %

Answer 29

mass of solute/ mass of total solution x100

Question 30

formula for volume percent

Answer 30

volume of solute/ volume of total solution x100

Question 31

parts per million equation (ppm)

Answer 31

mass of substance / mass of sample x10^6

Question 32

parts per billion equation

Answer 32

mass of substance / mass of sample x10^9

Question 33

what is the relationship between density and ppm or ppb

Answer 33

1 ppm = 1mg/L
1 ppb= 1micro/L

Question 34

what is a titrant

Answer 34

added to the analyte until the rxn is complete

Question 35

what is the endpoint

Answer 35

noticed by solution, physical property change

Question 36

what is the equivalence point

Answer 36

stoichiometric equivalence of titrant/ analyte

Question 37

primary and secondary standards

Answer 37

used directly where the exact amount is calculated and weighted

Question 38

direct and back titration

Answer 38

using excess amount of titrant

Question 39

blank titration

Answer 39

titration without the presence of analyte

Question 40

gravimetric titration

Answer 40

titrant is measure by mass rather than volume

Question 41

what is distillation

Answer 41

water is boiled to separate it from less volatile impurities (volatile= produces a vapor pressure)

Question 42

what is deionization

Answer 42

water is passed through a column that removes ionic impurities

Question 43

how do you prepare a solution of low conc. from a more conc. solution

Answer 43

use the formula
Mconc x Vconc = Mdilute x Vdilute
* make sure the units are the same on both sides*

Question 44

gravimetric analysis

Answer 44

measures the mass of a substance to complete analysis

Question 45

volumetric analysis

Answer 45

measures the volume of material needed to react with analyte

Question 46

what is the limiting reagent

Answer 46

species that is consumed first

Question 47

what happens once the limiting reagent is done

Answer 47

the reaction ceases

Question 48

how do you find the limiting reactant

Answer 48

1. find the number of moles of each reagent
2. compare the moles present to the moles required