CHM 131(GENERAL CHEMISTRY)
TITLE: STANDARD LABORATORY METHODS (EXPERIMENT 1)
NAME: MURSYIDA BINTI MOHD DAKROH(ID: 2015883226)
LAB COMPANIONS: NABILA SOFEABINTI ZAWAWI (ID: 2015850932)
: NUR ANISLYANA BINTI TAMAM (ID: 2015832718): NUR AUNI BINTI MOHD RADZIFF (ID: 2015863252) LECTURER NAME: MADAM DYIA SYALEYANA BINTI MD. SHUKRI
TIME OF RESEARCH: 30 06 2015
1 . To find out the qualitative and quantitative aspect of common laboratory tools. 2 . To show students for the factors that affect the accuracy and reliability of an research.
CHEMICALS AND APPARATUS
Distilled water, conditional balance, flacon, pipette(25ml), volumetric flask(25ml), conicalflask, beaker (50ml), and thermometer. PROCEDURE
1 . Calibration of volumetric flask
(a) A 25ml volumetric flask was cleaned and dried then, accurately acessed using synthetic balance. (b) The volumetric flask was filled with distilled water and weighed once again. (c) The temperature with the distilled water was recorded.
(d) From Table 1 . you, the actual volume of the volumetric flask was determined.
2 . Calibration of pipette
(a) A 50ml beaker was cleaned and dried then, accurately considered using conditional balance. (b) A 25ml pipette was cleaned and rinsed with distilled normal water. (c) The pipette was filled with distilled water using the procedures which were discussed in the introduction portion. (d) The distilled normal water was drained into the beaker and weighed again. The weight was written (e) Step 1-4 was repeated again and the temperatures of the distilled water was written. (f) From Table 1 ) 1, some of the volume of the pipette was determined
3. Tuned of flacon
A 50ml beaker was cleaned and dried in that case, accurately acessed using deductive balance. A burette was cleaned and rinsed using distilled water and the flacon was filled up with water until it finally reached the zero draw 5ml with the water was drained from your burette into the beaker and weighed. The weight was written. Step (c) was repeated by money water through the burette before the following flacon reading becomes 10ml, 15ml, and twenty ml. (Each time 5ml distilled normal water was added from the burette). The fat of the water and the beaker was recorded each time after adding 5ml of distilled water. From Desk 1 . one particular, the actual volume for every addition of 5ml of unadulterated water was determined. DISCUSSION
The effects that are attained are just like the prediction produced although there are some errors. Fromthe test alllow for the adjusted of volumetric flask, your data obtained intended for the volumetric flask's mass is twenty-two. 3369g. If the water was added, the mass to get both volumetric flask and the water a part of it is 47. 030. While the mass of the volumetric flask had been subtracted, the mass from the water can be 24. 6661 while its heat is 31Лљc. Therefore , through the table 1 ) 1, it's density of water is definitely 1 . 0053g/ml. therefore , the results received was acknowledged. For the experiment generated for the tuned of pipette, the data come that the mass of the beaker taken were 35. 6142g for trial (i) and 35. 5164g for trial (ii). Because the water added into the beaker, the data becomes 60. 5456g and 70. 2812g pertaining to trial (i) and (ii) respectively. When the mass of the beaker was subtracted, it can turn out that the mass with the water intended for trial(i) and (ii) are 24. 9314g and some. 7648g. In that case, when the temperatures of the water taken from both trial, is actually has the same temperature which is 29Лљc. coming from table 1 . 1, this shown the fact that density with the of the water is 1 . 0050g/ml. Again, the effects was accepted.
For the experiment from the calibration of burette, the results acquired are indefinite with the standard reading of burette. Intended for the initial reading which can be 5ml, the very last data received is some. 40ml. This kind of data can be not even close to the reading from the burette that had been fixed at the start of the test although it have been round...
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