Technical data

Redox Volumetric Titration: Cerimetry with Cobra SMARTsense

Article no: P3121067

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Principle

Potassium permanganate solutions which are used as oxidizing measuring solutions in redox titrations can in most cases be replaced by Ce(IV) solutions. These offer the advantages that they do not change on storage and that the course of the redox titration can be very conveniently followed by measuring the electrochemical potential. The equivalent point can then be found by determination of the inflection point of the potential curve which results from plotting the measured values.

Tasks

Titrate Iron(II) sulphate solution with Ce(IV) sulphate solution.

Learning objectives

Redox titration
Iron(II) sulphate
Ce(IV) sulphate
Titration
Cerimetry

Benefits

Drop counter optimizes the experimental procedure
Simplified implementation: all pre-settings already prepared
Extensive automation of the experiment allows concentration on the learning objectives

Necessary accessories

Precision balance 6200g/0.01g

Software provided. Computer not included.

Scope of delivery

Cobra SMARTsense ORP - Sensor for measuring the redox potential ±2000 mV (Bluetooth)	12927-00	1
measureLAB, multi-user license	14580-61	1
Holder for Cobra SMARTsense	12960-00	1
USB charger for Cobra SMARTsense and Cobra4	07938-99	2
Cobra SMARTsense Dropcounter - Sensor for measuring drops and pH during titration 0 ... ∞ / 0 ... 14 (Bluetooth + USB)	12923-00	1
Adapter, BNC male/4 mm female pair	07542-26	1
Reference electrode, AgCl	18475-00	1
Platinum electrode in protection tube, d = 8 mm	45206-00	1
Retort stand, h = 750 mm	37694-00	1
Right angle boss-head clamp	37697-00	3
Connecting cable, 32 A, red, various lengths	07361-01	1
Magnetic stirrer without heating, 3 ltr., 230 V	35761-99	1
Magnetic stirring bar 15 mm, cylindrical	46299-01	2
Burette, lateral stopcock, Schellbach, 50 ml	MAU-24022024	1
Burette clamp, roller mount., 2 pl.	37720-00	1
Funnel, diameter = 40 mm, plastic (PP)	36888-00	1
Bulb pipettes, various sizes	36578-00	1
Pipettor	36592-00	1
Funnels (glass), Boro, various sizes	34457-00	1
Volumetric flasks, Boro, various sizes	36551-00	2
Beakers, Boro, high form, various sizes	46025-00	3
Beakers, Boro, high form, various sizes	46032-00	1
Beakers, Boro, high form, various sizes	46027-00	1
Beakers, Boro, high form, various sizes	46029-00	1
Pasteur pipettes, 250 pcs	36590-00	1
Rubber caps, 10 pcs	39275-03	1
Spoon, special steel	33398-00	1
Wash bottle, plastic, 500 ml	33931-00	1
Cerium-/IV/-sulphate 25 g	31194-04	1
Iron-II sulphate 500 g	30072-50	1
Sulphuric acid, 95-97%, 500 ml	30219-50	1
Protecting glasses, clear glass	39316-00	1
Gloves, Neoprene, size M	46347-00	1
Volumetric flasks, Boro, various sizes	36548-00	1
Graduated pipette, 5 ml : 0,05	36602-00	1
Graduated cylinders, Boro, various sizes	36630-00	1
Stand rods, stainless steel, various sizes	02031-00	1