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
Cobra4 Wireless/USB-Link incl. USB cable 12601-10 2,00
Cobra4 Sensor-Unit Temperature 12640-00 1,00
Cobra4 Sensor-Unit Energy: Current, voltage, work, power 12656-00 1,00
Copper-II sulphate,cryst. 250 30126-25 1,00
Silica gel, orange, granular, 30224-50 1,00
Water, distilled 5 l 31246-81 1,00
Copper-II sulphate, anhydr. 25 31495-25 1,00
Silicon grease Molykote, 50 g 31863-05 1,00
Butane burner, Labogaz 206 type 32178-00 1,00
Porcelain plate f.desiccator150mm 32474-00 1,00
Porcelain dish 140ml, d 100mm 32518-00 1,00
Mortar with pestle, 150 ml, porcelain 32604-00 1,00
Wire gauze with ceramic, 160 x 160 mm 33287-01 1,00
Tripod,ring d=140 mm, h=240 mm 33302-00 1,00
Spoon, special steel 33398-00 1,00
Crucible tongs, 200 mm, stainless steel 33600-00 1,00
Wash bottle, plastic, 500 ml 33931-00 1,00
Desiccator, vacuum, diam. 150 mm 34126-00 1,00
Powder funnel, upper dia. 65mm 34472-00 1,00
Separator for magnetic bars 35680-03 1,00
Magnetic stirring bar 30 mm, oval 35680-04 1,00
Right angle boss-head clamp 37697-00 1,00
Universal clamp 37715-00 1,00
Beaker, 50 ml, high-form 46025-00 2,00
Supp.rod stainl.st.,50cm,M10-thr. 02022-20 1,00
Calorimeter, transparent, 1200 ml 04402-00 1,00
Heating coil with sockets 04450-00 1,00
Connecting cord, 32 A, 500 mm, black 07361-05 4,00
Butane cartridge C206, without valve, 190 g 47535-01 1,00
Magnetic stirrer with heater MR Hei-Standard 35751-93 1,00
curricuLAB measureLAB 14580-61 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
Document     Filesize
p3020761e.pdf Experiment guide, English 352.03 KB

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