Sunday 7 December 2014

lab report

Which antacid neutralizes the stomach the quickest?
Aim:  to see which antacid can neutralize the stomach the quickest and if baking soda can be used as an antacid
Hypothesis:  I think the Gaviscon will be the fastest and that baking soda can act as an antacid to neutralize the stomach
Independent: the different antacids that are going in the HCL    
Dependent: to measure the color of the indicator
Control: the amount of antacid and the HCL
Method:
1.       put on your safety goggles and lab coats
2.       set up all your equipment
3.       put the test tubes into the test tube holders
4.       measure the HCL correctly into the test tubes (IT MUST BE THE SAME AMOUNT)
5.       Crush tablets into  a fine powdery solution
6.       Use the universal indicator to measure the ph in each test tubes (just to be sure)
7.       Put the crushed tablets into water (it must be the same amount as the water) and mix it together to form an alkaline solution
8.       Pour it into the test tubes and mix together
9.       Take a small amount of the mixture and add it to the universal indicator in the spotting tile to see which color it changes to and what happens to it (how it reacts e.g frizzy, bubbly e.t.c )
10.     Get your timer and start timing immediately the first mixture of antacid and hydrochloric acid goes in
11.   Observe it and wait for what happens to it in 1 min, 2 min and 3 min and write it down in the table of observation
12.   Repeat step 7 to 11 to the rest of the antacids
Apparatus :
v  Test tubes                                                                           
v  Test tubes holders                                                    
v  Pestle and mortar
v  Timer
v  Universal indicator
v  Pipettes
v  Water
v  Goggles
v  Weighing balance
v  Hydrochloric acid
v  Spotting tile
v  Burette
v  Lab coats
v  Indigestion tablets:  eno, gaviscon, rennie

medicine
1 minute
2 minute
3 minute
Rennie
Turned orange ,
Bubbly and the test tube reaction was foamy
Light orange and neutralizing very slowly
Very light orange, almost yellow with white particles moving around
Eno
Very fast reacting , bubbling, foamy, light redish orange
Turning lighter  orange
Turned into an incredibly very very light orange
Baking soda
Completely green , fully neutralized
Lighter green, bubbling, white particles moving around
Lighter green , bordering on blue
Gaviscon
Bubbling, very lumpy, dry, orange
Orangish, lumpy, green
VERY DARK GREEEN
ALMOST NEUTRALIZED, STILL LUMPY


  Conclusion

MY HYPOTHESIS WAS CORRECT BECAUSE THE BAKING SODA CAN BE USED AS AN ANTACID AND WAS THE FASTEST IN THE FOUR BUT THE GAVISCON WAS SLOW AND EXTREMELY LUMPY PROBABLY BECAUSE OUR CALCULATIONS WAS EXTREMELY WRONG, WE CALCULATED THAT 4 GAVISCON TABLETS WILL BE THE SAME AMOUNT AS 1 TABLET OF THE OTHER ANTACID AND INSTEAD OF INCREASING THE AMOUNT OF ACID WE DIDN’T. THEN WHEN WE SAW THE MIXTURE WAS TO LUMPY WE ADDED MORE HYDROCHLORIC ACID AND DID NOT MEASURE IT WHICH WAS A GREAT MISTAKE