Moles Calculations
No description yet. This curated deck is ready for daily study.
Card preview (10)
Formula for mass of solid ?
Mol = mass/mr
Formula for concentration and volume of solution ?
Moles = concentration (mol dem-3 )x volume (dm3) or litres
Conversation from dm3 to cm3 and cm3 to dm3?
Dm3 to cm3 is x1000 Cm3 to dm3 is /1000
What is an aqueous solution ?
This is when a solute is dissolved in water (its concentration is measured in moles per litre - mol dm-3)
What is a standard solution ?
A solution of known concentration which does not change (solute does not decompose/ evaporate over time) They are used in titrations to calculate concentration of unknown solutions
What s a volumetric flask ?
This is a flask used to measure the concentration of aqueous solution accurately Used in titration
Formula for volume of gas ?
Moles = volume /24(dm3) or 24 000(cm3) at RTP
1 mole of any gas at RTP in 24 litres or dm3
Room temp - 25 degrees Room pressure- 1atm (101kpa)
What is the ideal gas equation?
PV = nRT
What does each letter in the idea gas equation stand for ?
P- pressure - pascals (Pa) - could be k pascals (convert) x 1000 V- volume - (m3) - could be in dm3 or cm 3 (dm3 to m3 divide by 1000)(cm3 to m3 divide by 1 000 000) n - amount - (moles) R- gas constant - if not given its always (8.314 ) -jmol-1 or k-1) T - temperature (kelvin) - could be in degrees ( degrees to kelvin is + 273)