Amount Of Substance Flashcards
What are the ionic formulas for:
Sulphuric acid
Hydrochloric acid
Nitric acid
Phosphoric acid
- H2SO4
- HCl
- HNO3
- H3PO4
Define relative atomic mass
The average mass of an atom relative to 1/12th mass of a 12C atom
What is a standard solution? (volumetric solution)
A standard solution is is any solution you know the exact concentration of
- Before you do titrations might have to make up standard solution
During a titration, a student rinsed the inside of the conical flask with distilled water.
Why does rinsing not give an incorrect result?
Water doesn’t react (with solution)
How do you calculate yield?
%yield = (actual mass/theoretical mass) x 100
What is a neutralisation reaction?
When an acid reacts with an alkali you get salt and water = neutralisation reaction
Gases summary
- in order to perform calculations assume they behave like an ideal gas
- there are no forces between particles, size of particles is negligible
- real gases are not ideal gases
What are insoluble salts?
Some salts are insoluble in water solutions containing two ions which are mixed, an insoluble salt forms = precipitate
Soluble vs Insoluble salts
Carbonates
Soluble = sodium carbonate, potassium carbonate, ammonium carbonate
Insoluble = all other carbonates
Soluble vs Insoluble salts
Nitrates
Soluble: All nitrates
Insoluble: None
Soluble vs Insoluble salts
Chlorides
Soluble: All chlorides except
Insoluble: Lead (II) chloride, Silver chloride
Soluble vs Insoluble salts
Sulfates
Soluble: All except
Insoluble: Calcium sulfate (sparingly soluble), Lead (II) sulfate, Barium sulfate
Soluble vs Insoluble salts
Ammonium salts & Grp 1 metal salts
Soluble: All
Insoluble: None
What is the ideal gas equation?
PV=nRT
