Topic 1/11 Flashcards
How to determine the excess of reactant?
Limiting reactant x (mol of ER/mol of LR)
What is the triangle that includes molar volume of a gas
V
n m
V is volume of gas, n is mol and m is molar volujme 22.7 dm per mol
How to figure out number of atoms?
N
n Na
Make sure to multiply by number of atoms in the compound
How to find limiting reactant?
Divide moles of each reactant BY coefficent
What is total pressure after two gas samples mix?
Given volume and pressure of both containers
Use P2 = P1V1/V2 with V2 being the combined volume of both containers and find P2 in each container and then add those together
Significant figures when adding or subtracting
Value with least decimal places is answer
Significant figures with multiply and divide
Value with least sig figs
For double displacement, the reaction has only happened if one of the products isn’t..
A solid or water (use soluability chart)
Solid to gas and gas to solid
Sublimination, despoition
Liquid to gas and gas to liquid
Evaporation, condensation
Reasons why theoretrical yield would be lower and higher (3 and 1)
Solutions stick to glassware, reactants may not have been pure, reaction may not have been completed at the time product yield is measures
Subsequent reaction occurs adding new product with greater mass
Ideal gas law
Pv = nrt
p in Kpa or pa
v = L or m3
n
r
t = k
How many significant figures are uncertainties typically reported to?
1
Complete combustion of 0.1595g of menthol produces 0.4490g of carbon
dioxide and 0.1840g of water. How to find moles of carbon and hydrogen?
To find moles of carbon,
0.4490/44.01 (moles of carbon dioxide)
0.1840 x 2/18.02
(two hydrogens
How to convert pv = nrt to calculate molar mass?
M = mrt/PV
