Properties of Group 3 Oxides

ICT

Design

DC

DPP

CE

MS

Periodicity – Investigation of the properties of period 3 oxides1 Aim: The purpose of this practical to examine the oxides of period 3 elements. Requirements:  Safety goggles (the practicals marked with an * should be done in the fume cupboard  4 test tubes  Test tube rack  10cm3 measuring cylinder  thermometer 100C-1000C  spatula  teat pipettes Reagents/compounds  Magnesium oxide  Aluminium oxide  Phosphorous pentoxide  Silicon oxide  Universal indicator solution  Distlled water  Sulphur dioxide is in the fume hood Procedure A Examine the oxide samples and copy the results in the table given below. Record your results in the given table  Solid, liquid or gas  The colour if any Safety Precautions  Phosphorous pentoxide is corrosive and irritates eyes. The reactions will be demonstrated to you by the teacher.  Sulphur dioxide has a chocking small Procedure B – Record all your results in the given table Ref 1-Independent learning Project For advanced Chemistry second Edition Revised by Ann Lainchbury, John Stephens, Alec Thompson

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Set up 4 test tubes side by side. Into each tube pour about 5 ml of distilled water In the first test tube place a thermometer a. Note the temperature b. Add a half a spatula of the MgO and stir carefully with the thermometer c. Note after about one minute the temperature, the solubility or any other observation (eg.Gas evolved etc…) d. Add 2-4 dropd of universal indicator solution and compare the colour with the chart provided. Note Repeat the above steps with other oxides. Report the pH of the aqueous SO2 provided in the fumehood.

Appearance

Na2O(find from internet)

MgO

Al2O3

SiO2

P2O5(demonstration SO2 only)

State colour On mixing with water Initial Temperature Final Temperature Does it dissolve

pH of the solution Other observations

Following information should be gathered from the data booklet or internet Melting point Boiling point Structure (Ionic/covent)

Ref 1-Independent learning Project For advanced Chemistry second Edition Revised by Ann Lainchbury, John Stephens, Alec Thompson

conductivity

Ref 1-Independent learning Project For advanced Chemistry second Edition Revised by Ann Lainchbury, John Stephens, Alec Thompson