Product details

Determination of the hydration enthalpy of an electrolyte (solution enthalpy) with Cobra4

Determination of the hydration enthalpy of an electrolyte (solution enthalpy) with Cobra4

Item no.: P3020761

Experiment Type: Teacher Experiment, Laboratory Experiment

Difficulty Expenditure of Time print
  • Description
  • Scope of Supply
  • Accessories
  • Downloads and Documents

Principle

When a solid electrolyte dissolves in water, a positive or negative heat effect occurs as a result of the destruction of the crystal lattice and the formation of hydrated ions. The enthalpy of hydration of copper sulphate can be calculated from the different heats of reaction measured when anhydrous and hydrated copper sulphate are separately dissolved in water.

Benefits

  • Calorimeters with particularly high capacitance
  • Part of a system solution - Easily expandable for further experiments
  • Simplified implementation: all pre-settings already prepared

Tasks

  1. Record temperature-time curves for the dissolution of anhydrous copper sulphate and hydrated copper sulphate in water.
  2. Calculate the hydration enthalpy of anhydrous copper(II)sulphate.

What you can learn about

  • Integral enthalpy of solution
  • Hess's law
  • Lattice energy
  • Ion solvation
  • Calorimetry

Necessary accessories

  • Precision balance 6200g/0.01g

 This experiment requires a computer. Software provided.

Device Name Item no. Qty
curricuLAB measureLAB 14580-61 1,00
Silicon grease Molykote, 50 g 31863-05 1,00
Cobra4 Wireless/USB-Link incl. USB cable 12601-10 2,00
Calorimeter, transparent, 1200 ml 04402-00 1,00
Powder funnel, upper dia. 65mm 34472-00 1,00
Mortar with pestle, 150 ml, porcelain 32604-00 1,00
Silica gel, orange, granular, 30224-50 1,00
Magnetic stirrer with heater MR Hei-Standard 35751-93 1,00
Universal clamp 37715-00 1,00
Crucible tongs, 200 mm, stainless steel 33600-00 1,00
Butane burner, Labogaz 206 type 32178-00 1,00
Cobra4 Sensor-Unit Temperature 12640-00 1,00
Heating coil with sockets 04450-00 1,00
Separator for magnetic bars 35680-03 1,00
Wire gauze with ceramic, 160 x 160 mm 33287-01 1,00
Beaker, 50 ml, high-form 46025-00 2,00
Wash bottle, plastic, 500 ml 33931-00 1,00
Porcelain plate f.desiccator150mm 32474-00 1,00
Cobra4 Sensor-Unit Energy: Current, voltage, work, power 12656-00 1,00
Connecting cord, 32 A, 500 mm, black 07361-05 4,00
Magnetic stirring bar 30 mm, oval 35680-04 1,00
Tripod,ring d=140 mm, h=240 mm 33302-00 1,00
Copper-II sulphate, anhydr. 25 31495-25 1,00
PHYWE power supply, universal DC: 0...18 V, 0...5 A / AC: 2/4/6/8/10/12/15 V, 5 A 13504-93 1,00
Supp.rod stainl.st.,50cm,M10-thr. 02022-20 1,00
Desiccator, vacuum, diam. 150 mm 34126-00 1,00
Porcelain dish 140ml, d 100mm 32518-00 1,00
Copper-II sulphate,cryst. 250 30126-25 1,00
Butane cartridge C206, without valve, 190 g 47535-01 1,00
Right angle boss-head clamp 37697-00 1,00
Spoon, special steel 33398-00 1,00
Water, distilled 5 l 31246-81 1,00
Document     Filesize
p3020761e.pdf Experiment guide, English 352.03 KB

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