Test 1 Chemistry 116 Flashcards
Matter
A substance that has mass and occupies space
States of Matter
Solid, liquid, gas
Mixture (homogenous, heterogeneous)
Matter containing more than one type of atom, molecule, etc.
Homogenous: uniform consistency
Heterogenous: non-uniform consistency
Scientific Method
- Question
- Research
- Hypothesis
- Experiment
- Data Analysis
- Conclusion
- Communication
Theory v.s. Law
Theory: Tested, unifying statement explaining a series of observations
Law: Conceptual or mathematical statement about what is observed in nature (fact)
Accuracy v.s. Precision
Accuracy: how close results how to a known
Precision: how close results are to each other
Sig Fig +/- Rule
Answer has the amount of decimal points as the number with the fewest decimal places
Sig Fig x/div Rule
Answer has the amount of sig figs as the number with the fewest sig figs
SI Units for mass, length, volume, and temperature
kg, m, m^3 (L), kelvin
Fahrenheit Formula
F= (9/5 C) +32
Celsius Formula
C= (5/9)(F - 32)
Kelvin Formula
K= C+273.15
SI Prefix- Mega (M)
10^6 from m
SI Prefix- Kilo (k)
10^3 from m
SI Prefix- Deci (d)
10^-1 from m
SI Prefix- Centi (c)
10^-2 from m
SI Prefix- Milli (m)
10^-3 from m
SI Prefix- Micro (u)
10^-6 from m
SI Prefix- Nano (n)
10^-9 from m
SI Prefix- Pico (p)
10^-12 from m
Solids have a ___ shape and are not appreciable ___
definite, compressible
If matter is uniform throughout, cannot be separated by physical processes but can be decomposed into other substances by chemical processes, it’s called___
Compound
Initial tentative explanation of an observation
Hypothesis
One degree of temperature difference is smallest on the __ scale.
Fahrenheit
Freezing point at
C-
F-
K-
0, 32, 273.15
Dalton’s Postulates
- Elements are composed of small particles known as atoms
- All atoms of given element are identical to one another in mass and other properties (and vice versa)
- Atoms of an element cannot change into atoms of another element
- Compounds are formed when atoms of more than one element combine
Law of Conservation of Matter
The mass of the products= mass of the reactants
Matter is neither created or destroyed (minus nuke reactions)
Law of Multiple Proportions
When elements combine, they do so in a ratio of small whole numbers
Who discovered the Law of Multiple Proportions
Dalton
Matter
Any substance that has mass and occupies space
Atoms
The fundamental building blocks of matter
Types of Mixtures
Homogenous: uniform comp. ex: saltwater, sugar water
Heterogenous: non-uniform
Types of Pure Substances
Compound: can be chemically decomposed
Element: can’t be chemical decomposed
Initial/tentative explanation of an observation
Hypothesis
SI units for mass, length, volume, temperature
kg, m, m^3 (L), Kelvin
Celsius Equation
C= (5/9)(F-32)
Fahrenheit Equation
F= (9/5C)+32
Kelvin Equation
K= C+273.15
SI Prefix - Mega
10^6
SI Prefix - Kilo
10^3
SI Prefix - Deci
10^-1
SI Prefix - Centi
10^-2
SI Prefix - Milli
10^-3
SI Prefix - Micro
10^-6
SI Prefix - Nano
10^-9
SI Prefix - Pico
10^-12
Solids have a ___ shape and are not appreciably ___
definite, compressible
Dalton Postulates
- Each element is composed of extremely small particles called atoms
- All atoms of a given element are identical to one another in mass and other properties
- Atoms of an element are not changed into atoms of a different element by chemical reactions; atoms are neither created nor destroyed in chemical reactions
- Compounds are formed when atoms of more than one element combine; a given compound always has the same relative number and kind of atoms
Law of Conservation of Matter: who and what
Lavoisier
The mass of the products is the same as the reactants (matter is neither created nor destroyed but nuclear reactions are different, we don’t look at those)
Law of Multiple Proportions: who and what
Dalton
When elements combine, they combine in a ratio of small whole numbers. If two elements can form more than one compound, the ratios of the weight of one element to the weight of the other are small whole numbers
Law of Definite Proportions: who and what
Proust
The same compound will always be comprised of its constituent elements in the same proportion by mass.
J. J. Thomson’s Experiment, what did he suggest
Cathode ray experiment, discovered electrons
Robert Millikan’s Experiment, what did he suggest
Oil Drop Experiment, calculated the charge of electrons
Ernest Rutherford Experiment, what did he suggest?
Gold foil experiment (shot alpha positive particles into gold) , discovered the nucleus AND the nuclear model of the atom
Plum Pudding Model, who and what?
Thomson
Positive charge space with electrons (wrong)
Nuclear Model
Nucleus with protons and neutrons, electrons were surrounding it (wrong)
James Chadwick
Neutron
Radioactivity, who?
Becquerel
Spontaneous emission of radiation by an atom
Who discovered there were 3 types of radiation, what are they?
Rutherford
Alpha (+)
Beta (-)
Gamma (neutral)
Atomic number
Protons
Isoelectronic series
Elements with the same number of electrons
Isotope
Same element, different amount of neutrons
Allotropes
Multiple forms in which an element can exist
ex: carbon is graphite and diamond, only difference is the structure
7 diatomic molecules
H2, N2, O2, F2, I2, C2,Br2
HAVE
NO
FEAR
OF
ICE
COLD
BEER
Who do we credit for the modern periodic table?
Mendeleev
Metals characteristics
-Malleable
-Ductile
-Shiny
-Great conductors
-High melting and boiling points
Nonmetal characteristics
Opposite of metals
Alkali Metals, group and characteristics
1A; soft, dull metals, REACT VIOLENTLY WITH WATER AND MORE AS U GO DOWN
Alkaline Earth Metals, group and characteristics
2A; harder than 1A, react less violently to water
Halogen, group and characteristics
7A; naturally occur diatonically and VERY
Noble gases, group and characteristics
8A, colorless, monoatomic, inert, unreactive
Pair of substances that can be used to illustrate the Law of Multiple Proportions
H2O and CO2
What charge does zinc make?
+2
What charge does Silver (Ag) make?
+1
1 in to cm
2.54
Group 6A is known as
Chalcogen
Al
Aluminium
Ar
Argon
Ba
Barium
As
Arsenic
B
Boron
Cd
Cadmium
Ca
Calcium
C
Carbon
Cl
Chlorine
Cr
Chromium
Co
Cobalt
Cu
Copper
F
Fluorine
Au
Gold
H
Hydrogen
He
Helium
I
Iodine
Fe
Iron
Kr
Krypton
Pb
Lead
Li
Lithium
Mg
Magnesium
Mn
Manganese
Hg
Mercury
Ne
Neon
Ni
Nickel
N
Nitrogen
O
Oxygen
P
Phosphorus
K
Potassium
Sc
Scandium
Se
Selenium
Si
Silicon
Ag
Silver
Na
Sodium
Sr
Strontium
S
Sulfur
Sn
Tin
Ti
Titanium
V
Vanadium
Zn
Zinc
Xe
Xenon
When naming an ionic compound, monoatomic anions use the ending __
-ide
Metal + Nonmetal = ionic and what ending
-ide
Metal (with cation charge) + Nonmetal has what ending
-ide
Metal (____) + Polyatomic Ion
Cation charge
All ionic compounds are crystalline solids with ___ melting points.
High
Covalent bonds are formed between 2 ___
Nonmetals
Covalent compounds can be ___, ____, or ___ at room temperature
solids, liquids, gases
In a binary covalent compound, the ___ electronegative atom is usually listed first.
Less
In a covalent compound, the prefix ___ is not used on the first element listed.
Mono-
Binary acids consist of __ + nonmetal
Hydrogen
In a binary acid, ___ in listed first in the formula
Hydrogen
Binary Acid:
Hydrogen + anion+ ___ acid
-ic
An oxyacid is a Hydrogen + ____
Polyatomic Anion
When naming an oxyacid, hydrogen is listed first in the formula and you can/can’t have more than one hydrogen
Can’t
For oxyacids, -ite is changed to ___ and -ate is changed to __
-ous, -ic
What are the 7 strong acids
Hydrochloric Acid - HCl
Hydrobromic Acid - HBr
Hydroiodic Acid - HI
Chloric Acid - HClO4
Perchloric Acid - HClO4
Nitric Acid - HNO3
Sulfuric Acid - H2SO4
Acetic Acid formula
CH3COOH
Phosphoric Acid formula
H3PO4
Chlorous Acid formula
HClO2
Hypochlorous Acid formula
ClOH
least O - ___
less O - ___
more O - ___
most O - ___
hypo- + -ite
-ite
-ate
per- + -ate
Linear alkane means there is only ___ and ___ in the formula
Carbon and hydrogen
How to find the number of carbon and hydrogen in a linear alkane?
C(x) H (2x+2)
Linear Alkane: prefix - ___
-ane
Prefix from 1-10 for Linear Alkanes
1- meth
2- eth
3- prop
4- but
5- pent
6- hex
7- hept
8- oct
9- non
10- dec
Functional Groups, what are they?
COOH- ___
NH2- ___
OH- ___
Carboxylic group
Amino group
Hydroxyl group (different than OH-)
Molar mass of a compound is the sum of ___
atomic masses of each atom in the compound
Mass Percent Formula
[(Mass of part)/ (Mass of whole)] *100
Three steps to finding the empirical formula
- Determine the mass (g) of each element from mass % (assuming you have a 100g sample)
- Convert the mass of each element to moles and use the atomic mass of each element as the conversion factor
- Divide all the moles by the smallest number of moles
When finding the empirical formula, you can round the number up moles to the nearest whole number when they are within ___ of a whole number.
0.15
When a metal and nonmetal react, the __ tends to lose electrons and the ___ tends to gain electrons.
metal, nonmetal
Ionic compounds with waters of hydration are named as ___
“ionic compound” prefix-hydrate