January 2024
When calculating pressure conversions, how do you know when you need 2 or 3 Fractions?
Depending on what your converting it into.
What makes Hydrogen Bonding special?
Hydrogen Bonding is a special kind of Dipole-Dipole interaction.
What do Coefficients represent in MR?
Coefficients in BCE are used to represent Mole Ratios (MR).
Explain what occurs when oil is placed in water.
It set in layers
What is Ocean Acidification (OA)
Describes decrease seawater pH and carbonate saturation that result from increase |Atmospheric Co2|
What is the definition for Magnetic Attraction?
Attraction is the ability of a substance to be attracted to a magnet.
Law of conservation of mass is
Law of conservation of mass:Total Mass of Reactants= Total Mass of Products
(Starting Materials) (Ending Materials)
What is LR and ER?
LR (Limiting Reactant) is a reactant that LIMITS (RESTRICTS) the amount of Products that can be formed.
ER (Excess Reactant) is a reactant that does NOT limit (doesn't not restrict) the amount of Products that can be formed.
What is the equation for a Solution
Solute+Solvent=Solution
What other problem is Ocean Acidification linked to?
Major environmental issue lined to climate change (cc)
Why do scientists use a unit called a mole?
To make it easier for scientists to compare the number of particles in different substances.
What are the five CR types?
Synthesis Reaction, Decomposition Reaction, Single Displacement Reaction, Double Displacement Reaction, Combustion Reaction, and Hydrocarbon.
How many fractions are needed if you pass through Atomville, Atomville, Avogadro's Lane, and Avogadro's Pl.
3 Fractions.
What is a Homogeneous Mixture and how is related to a Solution?
A Homogeneous Mixture (HM) is a mixture where the composition is uniform (Consistent) throughout. A Homogeneous Mixture is related to a Solution because a Solution is a Homogeneous Mixture composed of a Solute dissolved in a Solvent.
What does pH measure?
Measures [H^+1] to determine Acidity and Basicity of a soln.
What is a Significant Figure (SF)?
Consist of all digits known in a measurement with certainty, plus the first uncertain or estimated digit.
Given description, write unbalanced chemical Equation.
Gaseous Tricarbon Octahydride mixes with oxygen gas to form water vapor plus gaseous carbon dioxide.
C3H8(g)+O2--->H2O(g)+CO2(g)
What is the MR (Mole ratio) of
BCE: C3H8(g)+5O2(g)--->3CO2(g)+2H2O(g)
MR= 1 mol C3H8: 5 mol O2: 3 mol CO2: 4 mol H2O
Calculate the morality of a solution prepared by dissolving 5.247 g AgNO3 in enough water to make 20.5 L of solution.
mm(AgNO3)=169.88 g/mol
Look at paper!
Chem Rxn1). CH4(g) + H2S(g)<=> CS2(g) + 4H2(g)
H=-285kJ
What is the Temperature if it is decreasing and what is the pressure if it is increasing.
Check paper
What is Boyle's Law?
Volume of a gas at a constant Temperature is inversely proportional to its pressure.
Add Coefficient to Balance the unbalanced chemical Equation.
__ C2H6(g)+__ O2(g)--->__ H2O(g)+__ CO2(g)
2 C2H6(g)+7 O2(g)--->6 H2O(g)+4 CO2(g)
Determine the LR and ER in the problem:Calculate #g CO2 produced if 128.5 g C8H18 reacts with 76.81 g O2.
BCE:2C8H18(g)+25O2(g)--->18H2O(g)+16CO2(g)
mm(C8H18)=114.26 g/mol mm(O2)=32.00 g/mol
mm(CO2)=44.01 g/mol
Look at paper provided.
How can you tell if a Aqueous Solution is Acidic,Basic, or Neutral
Acidic solution=[H+1]>[OH-1]
Basic solution=[H+1]<[OH-1]
Neutral solution=[H+1]=[OH-1]
Calculate pH of a 1.9x10-12M OH-1 aqueous solution at 25.c. State whether aqueous solution is Acidic,Basic,or Neutral.
pH=Kw=[H+1] [OH-1] 1.0x10-14 = .53x10-2M
[OH-1] [OH-1] 1.9x10-12 ^ 5.3x10-2M
pH=-log(5.3x10-2)
pH=1.28
ACIDIC!