DEPTH STUDY PART B: SCIENTIFIC REPORT
AIM: To determine the concentration of a copper (II) sulfate pentahydrate solution of
unknown concentration by colourimetry and precipitation reactions and to compare the
accuracy of the two methods.
HYPOTHESIS: The most effective and accurate method of testing the concentration of an
unknown solution of copper (II) sulfate pentahydrate is colourimetry. The errors involved in
colourimetry is comparatively less than precipitation reactions, thus allowing more accurate
results.
EQUIPMENT:
• Volumetric flask (100mL)
• Colourimeter
• 50ml Beaker
• 140ml Beaker
• Copper (II) sulfate pentahydrate
• Electronic balance
• Spatula
• Distilled water
• Wash bottle
• Thistle Funnel
• Cuvette (1cm x 1cm)
• Stopper
• Volumetric pipette (25mL)
• Pipette filler
• Ring clamp
• Retort stand
• Conical flask
• Filter paper
• Glass funnel
• Spatula
• Sodium Hydroxide
• Sodium Carbonate
, RISK ASSESSMENT:
SUBSTANCE RISK MANAGEMENT
Copper (II) sulfate, • Harmful if swallowed • Avoid swallowing
pentahydrate • Causes serious eye • Immediately wash
and skin irritation eyes and skin if
• Very toxic to aquatic irritated
(CuSO4.5H2O) life with long lasting • Wear safety glasses
effects • Avoid disposing
(environmentally substances in the sink.
damaging)
Sodium hydroxide, solid • Causes severe skin • Wear safety glasses
(NaOH) burns and eye • Wash thoroughly
damage after use
• Caustic
Sodium carbonate, anhydrous • Causes serious eye • Wear safety glasses
(Na2CO3) irritation • Immediately rinse
eyes with water if
irritated.
Beaker • Beaker breakage • Immediately clean
• Cuts from chipped area after breakage to
rims of beaker avoid further injuries
• Inspect and discard
beaker if damaged
Thistle funnel • Possibility of breakage • Inspect and discard
• Severe cuts when thistle funnel if
inserting/removing damaged
from fittings • Immediately clean
area after breakage to
avoid further injuries
Volumetric flask • Chips around rims can • Inspect and discard
cause cuts volumetric flask even
• The flat bottom of the if slightly damaged
flask is prone to • Immediately clean
breakage if dropped area after breakage to
avoid further injuries
AIM: To determine the concentration of a copper (II) sulfate pentahydrate solution of
unknown concentration by colourimetry and precipitation reactions and to compare the
accuracy of the two methods.
HYPOTHESIS: The most effective and accurate method of testing the concentration of an
unknown solution of copper (II) sulfate pentahydrate is colourimetry. The errors involved in
colourimetry is comparatively less than precipitation reactions, thus allowing more accurate
results.
EQUIPMENT:
• Volumetric flask (100mL)
• Colourimeter
• 50ml Beaker
• 140ml Beaker
• Copper (II) sulfate pentahydrate
• Electronic balance
• Spatula
• Distilled water
• Wash bottle
• Thistle Funnel
• Cuvette (1cm x 1cm)
• Stopper
• Volumetric pipette (25mL)
• Pipette filler
• Ring clamp
• Retort stand
• Conical flask
• Filter paper
• Glass funnel
• Spatula
• Sodium Hydroxide
• Sodium Carbonate
, RISK ASSESSMENT:
SUBSTANCE RISK MANAGEMENT
Copper (II) sulfate, • Harmful if swallowed • Avoid swallowing
pentahydrate • Causes serious eye • Immediately wash
and skin irritation eyes and skin if
• Very toxic to aquatic irritated
(CuSO4.5H2O) life with long lasting • Wear safety glasses
effects • Avoid disposing
(environmentally substances in the sink.
damaging)
Sodium hydroxide, solid • Causes severe skin • Wear safety glasses
(NaOH) burns and eye • Wash thoroughly
damage after use
• Caustic
Sodium carbonate, anhydrous • Causes serious eye • Wear safety glasses
(Na2CO3) irritation • Immediately rinse
eyes with water if
irritated.
Beaker • Beaker breakage • Immediately clean
• Cuts from chipped area after breakage to
rims of beaker avoid further injuries
• Inspect and discard
beaker if damaged
Thistle funnel • Possibility of breakage • Inspect and discard
• Severe cuts when thistle funnel if
inserting/removing damaged
from fittings • Immediately clean
area after breakage to
avoid further injuries
Volumetric flask • Chips around rims can • Inspect and discard
cause cuts volumetric flask even
• The flat bottom of the if slightly damaged
flask is prone to • Immediately clean
breakage if dropped area after breakage to
avoid further injuries
