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Clementine

Cards (41)

Observations when a dilute acid is added to carbonate ion?
Effervesence, carbon dioxide is produced (which can be tested using limewater).
Observations when chloride ion in solution is mixed with a dilute nitric acid and aqeous silver nitrate? 
White precipitate forms
Observations when bromide anion is axidified with dilute nitric acid and aqueous silver nitrate?
Cream precipitate
Observations when iodide anion is acidified with dilute nitric acid and aqeous silver nitrate?
Yellow ppt
Observation when nitrate anion in solution is added to aqeous sodium hydroxide, then aluminium foils and is warmed?
Ammonia is produced (which can be tested for by using damp litmus paper - will turn blue).
Observation when sulfate anion in solution is added acidified dilute nitric acid, then add aqeous barium nitrate?
White ppt
Observation when sulfite anion is tested for by adding small voluem of acidified potassium manganate (VII)? 
Potassium manganate changes from purple to colourless.
Observations to test for Al+ in aqeous sodium hydroxide?
White ppt. soluble in excess, colourless solution
Observations for NH4 (ammonium) in aqeous sodium hydroxide?
Ammonia produced on warming - no ppt.
Observations for CA2+ in aqeous sodium hydroxide?
White ppt
Observations of chromium (III), Cr3+ in aqeous sodium hydroxide?
Green ppt, insolubel in excess.
Observations of Copper (11) Cu 2+ in aqeous sodium hydroxide?
Light blue ppt, insoluble in excess,
Observations of iron (II) Fe2+ in aqeous sodium hydroxide?
Green ppt, soluble in excess
Observations of iron (III) Fe3+ in aqeous sodium hydroxide?
red-brown ppt, insoluble in excess
Observation of Zinc Zn2+ in aqeous sodium hydorxide?
White ppt, soluble in excess and gives a coulourless solution
Observations of Al3+ in aqeous ammonia?
White ppt. insoluble in excess
Observations of Ca2+ in aqeous ammonia?
No ppt, or a slight white ppt
Observations of Cr3+ in aqeous ammonia?
green ppt, insoluble in excess
Observations Cu2+ in aqeous ammonia
Light blue ppt, soluble in excess, dark blue solution
Observations of Fe2+ in aqeous ammonia?
green ppt, insolble in excess and turns brown near surface on standing
Observations of Fe3+ in aqeous ammonia?
Red-brown ppt, insolble in excess
Observations of Zn2+ in aqeous ammonia?
White ppt. SOluble in excess, gives a colourless solution
What is a saturated solution?
A solution in which no more solute can dissolve at a given temperature.
Predict the state and colour of astantine at room temperature
Black solid
How can you predict the states and colours of the halogens?
The halogens get darker in colour as you go down the group - fluorine and chlorine are gases, bromine is a liquid and iodine and astantine are solids.
Predict the state and colour of fluorine?
Gas, pale yellow
Predict the state and colour of chlorine?
Gas, green
Predict the state and colour of bromine?
State: Liquid Color: Red
Predict the state and colour of iodine?
Solid, purple
If you were purifying nickel by electrolysis, what would the anode and cathode be made of?
Anode: impure nickel Cathode: pure nickel
What is a reducing agent?
A reducing agent is a substance that donates electrons and causes another substance to be reduced, while being oxidised itself.
What is an oxidising agent?
A substance that causes oxidation by accepting electrons from another substance, however the oxdising substance itself is reduced.
What is the symbol reaction for the Haber process?
N2 + 3H2 <=> 2NH3 (all gases)
Describe the Haber process
The Haber process is the process in which ammonia is manufactured from hydrogen and nitrogen
What are the sources of nitrogen and hydrogen in the Haber process?
Nitrogen: Air Hydrogen: Natural gas or methane
What are the conditions needed for the Haber process?
Pressure of 200atm, temp of 450 degrees C and an iron catalyst.
What are the solubility rules of salts?
Soluble salts can be made by reacting acids with soluble or insolbule reactants.
How are insoluble salts made?
Precipitation reactions
How are soluble salts made?
By reacting an acid with a base - titration
What is titration?
Titration is a laboratory technique used to determine the concentration of a substance in a solution by reacting it with a known concentration of another substance.