APPENDIX A MATERIAL AND METHODS Appendix A1 Preparation mixture of Sodium Hydroxide (NaOH), (2000 mL) and Citric Acid (C6H8O7), (1000 mL) as Buffer Preparation of Sodium Hydroxide (NaOH), (2000 mL) Molecular weight of Sodium Hydroxide, NaOH = 40 g/mol Prepare volume of 10.8 mL from 0.1 M Sodium Hydroxide (NaOH) solution Then, 10.8 mL Sodium Hydroxide ( NaOH) was diluted with 1000 mL distilled water in volumetric flask. Preparation of Citric Acid (C6H8O7) , (1000 mL) Molecular weight of Sodium Hydroxide, NaOH = 192.14 g/mol Prepare mass of 19.214 g from 0.1 M on Citric Acid (C6H8O7) Therefore, 19.2 g of Citric acid (C6H8O7) was mixed into 1000 mL distilled water. Preparation of buffer Then, add some drop of Sodium Hydroxide, (NaOH) and Citric Acid (C6H8O7) into the mixture to achieve the value of pH needed.
APPENDIX A MATERIAL AND METHODS Appendix A1 Preparation mixture of Sodium Hydroxide (NaOH), (2000 mL) and Citric Acid (C6H8O7), (1000 mL) as Buffer Preparation of Sodium Hydroxide (NaOH), (2000 mL) Molecular weight of Sodium Hydroxide, NaOH = 40 g/mol Prepare volume of 10.8 mL from 0.1 M Sodium Hydroxide (NaOH) solution Then, 10.8 mL Sodium Hydroxide ( NaOH) was diluted with 1000 mL distilled water in volumetric flask. Preparation of Citric Acid (C6H8O7) , (1000 mL) Molecular weight of Sodium Hydroxide, NaOH = 192.14 g/mol Prepare mass of 19.214 g from 0.1 M on Citric Acid (C6H8O7) Therefore, 19.2 g of Citric acid (C6H8O7) was mixed into 1000 mL distilled water. Preparation of buffer Then, add some drop of Sodium Hydroxide, (NaOH) and Citric Acid (C6H8O7) into the mixture to achieve the value of pH needed.
CD5904_MOHD_SHAHRIL_MUSTAFA.docx