Calculative Chemistry Flashcards
Equation to calculate moles
Mass/Mr
Equation to calculate mole concentration (mol dm^-3)
mass concentration (g dm^-3)/Mr
How to convert Celsius to Kelvin
Add 273 to the celsius amount
Titration
the term used to describe a solution of a known concentration is added to an unknown solution of unknown concentration to determine the unknown solution’s concentration which is seen through a colour change
Percentage yield
actual yield/theoretical yield x 100
How to find moles using concentration?
concentration(mol dm^-3) x volume(dm^3)
calculation for unknown concentration in titration
known concentration x volume of known/volume of unknown
What is stochiometry
A section of chemistry that involves using relationships between reactants and /or products in a chemical reaction to determine desired quantitative data
How to find mass using concentration
What do each of the units in the ideal gas equation represent?
P-Pressure(Pa)
V-Volume(dm^3)
n-Number of moles
R-Gas constant of 8.31 kJ mol ^-1
T-Temperature(K)
How to find empirical formula of a compound?
- Divide the Mass by the Mr of each given element to find the Moles of each element
- Divide each of the moles by the smallest mole amount
How to find the molecular formula of a compound using the empirical formula?
1.Find the Mr of the empirical formula of the compound.
2.Divide the Mr of the given formula mass by the Mr of the empirical formula of the compound
3. Multiply the multiplier number from Step 2 by the empirical formula
how to find mass of 1 molecule?
Mr/Avodagro’s constant
How to find moles from 24 dm^3
volume/24dm^3
