Chemistry 1
What are the elements in Group 18 called ?
Noble Gases
A dissolved substance is called ?
Solute
What is the acid and base theory given by Bronsted ?
Acids are proton donors
bases are proton acceptors
Mortar & Pestle does what ?
Grinds Solids
What is Avogadro's Number ?
number of representative particles in a mole, 6.02 X 10^23
What is atomic number?
total number of protons
The ability of a solute to be dissolved in a particular substance is called ?
Solubility
What did J.J Thompson do ?
discovered electrons
What measure volume more accurately a volumetric pipet or a graduated pipet?
volumetric pipet
A chemical reaction where two elements in different compounds trade places is what ?
Double Replacement
Type of bonding in metal oxides
ionic bonds
Calculate moles of gas liberated in excess oxygen when 32 g of methane combust as follows:
CH4 + 2O2 ---> CO2 + 2H2O
2 moles of CO2
Molarity is the defined as:
moles/ liter of solution
Method of separation of CaCO3 and salt
Filtration
Crystallization/ Evaporation
What is percent yield ?
the ratio of the actual yield to the theoretical yield, multiplied by 100
Products formed during a combustion reaction
CO2
H2O
Number of molecules in 32 g of methane CH4
12.044*1023
Family of hydrocarbon containing hydroxyl group
Alcohols
Used to volume during a titration
What is a limiting reactant ?
the substance that is consumed completely - controls the quantity of product that can form in a chemical reaction. Can be determined by calculating the mass of a single product formed from each reactant.
trend in metallic character across the period from left to right and down the group
Period: metallic character decreases
Group: metallic character increases
Methods of manufacturing ethanol
fermentation (combustion)
What are the four steps during mass spectroscopy
Ionization
Deflection
Acceleration
Detection
Elements exhibiting greatest reducing properties are where on the periodic table
left and down (easily oxidized)
What is the chemical formula for butanoic acid?
C3COOH. or C4O2H