Monday, September 12, 2016

πŸ‘»TitrationπŸ‘»

 Titration is a technique that chemists use to determine the unknown concentration of a known solution
In the case of the unknown concentration of acid, we can use a known concentration of hydroxide base. The reaction is called “neutralization”

Materials:
❄ 50 mL Buret with clamp
❄ Phenolphthalein indicator
❄ 250 mL Erlenmeyer flasks
❄ Buret funnel
250 mL beaker
25 mL volumetric pipette
Pipette bulb

Procedure:
Set up the clamp and 50 mL phenolpthalein in the Buret funnel .
 Mixed the 250 mL indicator solution with acid in beaker
 Drop the base drops by drops cautiously, while you drop, keep stiring the solution
When the acid solution start to turn into pink, stop.
 Record data



DATA 


weak acid
Strong acid

Trial 1
Trial 2
Trial 3
Trial 4
Initial buret volume [mL]
50
50
50
50
Final buret volume [mL]
50-11.2
50-19.4
50-19.3
50-19.2
Volume of base [L]
11.2
19.4
19.3
19.2
Moles of base [mol]
0.1
0.1
0.1
0.1
Volume of acid [L]
0.25
0.25
0.25
0.25
Moles of acid [mol]
(calculation)




🌸🌸DNA Necklace🌸🌸

🌼 Materials πŸŒΌ

🐀2 mL plastic cup
🐀 15- mL tube
🐀2 mL of cell lysis solution

🐀 pipet🐀ethanol


❤ Instructions 

Take 2 mL  of sport drink into your mouth and swish it around for 1 minute. As you swish, gently and continuously scrape the inside of your cheeks with your teeth to help release cheek cells.

 Spit the sport drink with collected cell back into the plastic cup.

 Carefully pour the solution into a labeled 15-mL tube.

Add 2 mL of cell lysis solution into the collected cheek cells and invert the tube 5 times.

Then, use the pipet to drop a 70% ethanol by running it down the inside of the tube. Add the ethanol until the solution reaches to 14 mL .

 Watch closely as wispy strands of translucent DNA begin to clump together where the ethanol layer meets the cell lysate layer.

 Place the 15-mL tube in the test tube rack and let it stands undisturbed for a minimum for 10 minutes. During this time, DNA will continue to precipitate out of the solution and extend like a ribbon through the ethanol layer.

                        

✨ 🌟 πŸ’« Electrolysis Experiment ✨ 🌟 πŸ’«





Material

✔  Petri dish
✔  Universal indicator solution

✔  58.5 g Sodium Chloride (NaCl)

✔   9 volt 
✔  electrode wires with alligator clips


Procedure


πŸŽƒ Fill a petri dish with distilled water
πŸŽƒ Add a small amount of salt and stir until dissolved
πŸŽƒ Add enough universal indicator to give a rich green colour
πŸŽƒ Attach each of the wire alligator clips to one end pencil lead. Attach the other ends of the electrodes to the battery poles, the red wire to the positive pole, the black wire to the negative pole. Turn the projector on.
πŸŽƒ As electrolysis progresses, colour changes will begin to occur
πŸŽƒPlace a niobium magnet in the middle and discuss what happens.




🍎 🍏 🍊Fruit Voltage🍎 🍏 🍊



🐧 Materials πŸ§
  • Fruits: Orange and lemon πŸŠ
  •  Metals: copper (penny), nickel (nickel), iron (regular nail), zinc (galvanized nail),
  •  Volt meter
  • Amp meter 
  • crocodile wire clips
  •  battery
Batteries need 3 total  parts. A cathode (positive electrode), and anode (negative
electrode), and an electrolyte (material to push the electrons). When making a fruit battery,
the juiciness of the fruit or vegetable is the electrolyte, and the two metals inserted into
the fruit are the electrodes  :) :)



                                                         Procedure
  •  Insert one electrode material into the juicy part of the fruit. 
  • Insert a second electrode into the juicy part of the fruit(but not so the two electrodes touch)
  •  Then, connect the electrodes to the meters with crocodile wire clip

Tuesday, June 28, 2016

What I will be like in 5 years

In the next 5 years,I will be turning as a 4th year medical student in England(I took Alevels in UK ,Cardiff Sixth form College for 1 and a half year after graduating from PHS).I would come back to Thailand for atleast 1 time a year or more, incase of any special occasions.While I'm studying there in England,I would be a kind of person that travels back and forth just only to the university(also to the hospital or wherever that md student studies ) and accommodation(Cuz the 4th year is tough ).Also,I might have a panda-like under eye ,unfixed hair,and a pig body shape due to the time limits XDXDXD