Trigonometry Lab

In Section A, the average mass of the 50 ml beaker was weighed 3 times using 2 different electronic balances. The final average mass recorded was 33.73g. The volume of distilled water needed was calculated from the mass of water using the density= 0.9971g/mL in Section B. The volume of water needed was transferred using pipette, graduated cylinder and Erlenmeyer flask respectively. In Section C, a pipette was calibrated by measuring the water temperature and the density was determined. The average mass of water was calculated and the reading was 20.68g. The value for the relative average deviation was 5.33%. In Section D, the crucible, crucible lid and anhydrous magnesium sulphate were weighed and the % water in magnesium sulphate hydrate was recorded calculated which is 41.56%.

In

The graph as circumference against the diameter of various beakers shows a straight line that increases linearly. The greater the size of beaker used, the greater the circumference and the diameter measured. In section F, CH3OH is placed in the category of toxic, flammable and reactive. NaOCH3 is under the group of toxic, flammable, reactive and corrosive. CH2O2 is corrosive which chemically damaging to living tissue.

The boiling point of the water increases when NaCl is added to it but the ice point of water decreases when NaCl is added to it. Our result supports the hypothesis where the boiling point increases from 96 °C to 99.5 °C. However the result for the ice point increases when NaCl is added.

In this experiment, the accuracy using various of volumetric glassware pieces and the proper usage of basic laboratory equipment were determined. In addition, the correct way to analyse data for lab findings was learnt. The precise details of the experiment were presented to help other researches to further their findings in this