LAB 4.docx - SKT 1013 INTRODUCTION TO INORGANIC CHEMISTRY...

This preview shows page 1 - 4 out of 4 pages.

SKT 1013 INTRODUCTION TO INORGANIC CHEMISTRY LAB REPORT 4: PREPARATION OF POTASSIUM TRIS (OXALATO) ALUMINATE (III) TRIHYDRATE PROFESOR MADYA DR. NORHAYATI BINTI HASHIM MUHAMAD HASRUL AKMAL BIN ABDUL HALIM E20172019097 AZMEER ZULFIQAR BIN REDZUAN E20172019114
OBJECTIVES: 1.) Synthesize potassium tris(oxalate)aluminate (III) trihydrate RESULTS & DISCUSSION: Figure 1. shows the result of titration of K 3 [Al(C 2 0 4 ) 3 ].3H 2 0 Mass of Aluminum (G) 0.5013 Volume of water (mL) 30 Volume of KOH (mL) 15 Mass of oxalic acid dehydrate (g) 8.1017 Mass of filter paper (g) 0.7995 Mass of filter paper + K 3 [Al(C 2 0 4 ) 3 ].3H 2 0 (g) 9.2994 Mass of K 3 [Al(C 2 0 4 ) 3 ].3H 2 0 (g) 8.4999
The mass of product K 3 [Al(C 2 0 4 ) 3 ].3H 2 0: 9.2994 g – 0.7995 g =8.4999 g Al 2 O 3 + 2OH - + 3H 2 O 2[Al(OH) 4 ] - (eq. 1) Al + 3KOH + 3H 2 C 2 O 4 .2H 2 O K 3 [Al(C 2 0 4 ) 3 ].3H 2 0 + 6H 2 O + 3/2H 2 (eq. 2) Mol of Al = 0.5g / 26.98 = 0.0185 mol Mol of H 2 C 2 O 4 = 8.0g / 90 = 0.889 mol Theoretical mass : 0.0185 mol x In this experiment, aluminum forms octahedral complex ion because it is a transition metal. The

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture