Wednesday, 11 January 2012

Homework for Wednesday - 11th Jan 2012

Hi all,

A lot of you were not able to complete the experiment earlier but not to worry, we'll go through the worksheet this coming Friday.

Try to complete the questions in the practical worksheet.

Also, please reflect on your performance during the practical session earlier on.
1. What are the 3 skills you have learnt during this practical session?
2. What are the 2 things you can do better during practical?
3. 1 word to describe your experience for this practical.

Post your reflection as a comment for this post.


  1. 1. I have learnt to make sense out of my results I get on the keylogger, as whatever is shown in there may not be right, for example what happened to me today was that the Napthalene was just stuck at -30 degrees celsius AFTER BOILING, so obviously if I was dumb enough to not make sense out of my results, I would have innocently continued. Second, is to watch out for hot boiling beakers and stuff like that and to handle them with care and be careful not to spill them. Sometimes when handling lab equipment, you can be a real klutz and just be very careless and may just break something or scald your hand by accident. Third is the adjusting of the retort stand, I've learnt that the retard stand has two screws on both sides and I have to learn to observe how it works to decide which to unscrew and adjust my apparatus to how I want it.

    2. The first thing I can do better is for me to observe and analyse the certain equipment before I want to do anything with it, just in case I mess up and make a really big mess in the lab. The second thing is that I have learnt to be more alert towards given instructions as they more or less have proper guidelines that will keep us safe and in track of the experiment, which is extremely crucial.

    3. If I had to describe the experience for this practical, it would be "nerve-racking" (not sure if that's two), because it's certainly has been quite some time since we touched Chemistry lab equipment and all the gas pipes all seem so foreign to me right now, so I certainly need some time getting used to it!

  2. 1. I had learnt the proper way of using the bunsen burner, like how I have to actually close the hole at the side so I do not burn myself, then open it. I also learnt that after 5 minutes, It can become really hot.This allows me to understand safety precautions and stay aware of this in the near future.I have learnt observation skills are important as shown when I had to use the DataLogger application to plot the graph. I had seen the graph slowly increase in temperature, then stabilize due to the melting point. It has allowed me to understand the practical graph way for the boiling curve.

    2. I have had trouble to turn on the bunsen burner at first and kept trying without offing the gas. Thus, this made the room smell like a gas leak. I would next time turn off the bunsen burner and then ask for help. I had also took the wrong graph and only realized 5 minutes after. I would next time read the entire question and remind myself of the task at hand to minimize time wastage.

    3. I would use a japanese word that would something like: omoshiroi. THis word means many things, one of which was interesting, in a good and useful way, as I had experienced solo practical for the first time and can safely say I can use the bunsen burner:D

  3. 1) I have learnt how to properly log data acquired from the experiment using either tabulation or from a data-logging device. Secondly, I have learnt the safety precautions when using a bunsen burner, for example sealing the oxygen hole before lighting the bunsen burner and obviously wearing safety goggles whenever the fire is burning. I have also learnt how to adjust the apparatus properly before beginning the experiment.

    2) Firstly, I would properly have to do much better when reading through the whole instruction and understanding it thoroughly before actually beginning the experiment. Secondly, I have to be more alert when it comes to handling the equipment, as it has safety hazards.

    3) That one word would probably be "Disappointing" seeing how I pretty much screwed up the first practical of the year. I will have to prevent myself from making the same mistake again.

  4. Abigail Agustines11/01/2012, 23:21

    1. The first thing that i learnt from the practical session earlier on is about the bunsen burner. At first, i didn't know the right way to use it and was afraid i would get hurt or burnt. But now i'm aware of the right way to start and use the bunsen burner like making sure the oxygen hole is closed before lighting it up.
    The second thing i learnt was the use of the apparatus, specifically the retort stand. I didn't know how to use the retort stand properly at first but after the experiment, i understood how to properly adjust it and what all the screws adjust.
    The third thing i learnt is to always be aware of your set up and always be careful because you'll never know when you might just drop something by accident.

    2. I could have been more aware of my set up because my bunsen burner wasn't directly under the beaker which made it boil slower and wasted time. I would have read the instructions more than 1 time because even though after reading it the first time, i was still pretty confused at the start but i managed to pick up along the way.

    1. It would have to be a 'recap' for me because it has been a while since i've did Chemistry practicals and the practical today certainly did help me refresh my memory on all the safety precautions and how to use the apparatus such as the retort stand and the bunsen burner.

  5. Abigail Agustines11/01/2012, 23:21

    3.* :\

  6. 1. Three skills would include: (a) How to operate a bunsen burner, (b) How to handle lab apparatus, with emphasis on dangerous ones such as hot glassware, (c) How to use a datalogger.

    2. (a) Listen more closely to the teacher during the practical briefing. Missed out on key changes to the worksheet. (b) Operate the data logger only when needed, as there were technical problems with the Learning Device at the time.

    3. Inexperienced.

  7. 1. What are the 3 skills you have learnt during this practical session?
    I learnt that I should read thermometers with the marking at my eye level in order to prevent parallax error, how to safely light and use a bunsen burner, and how to handle lab apparatus with safety.

    2. What are the 2 things you can do better during practical?
    I should have opened the oxygen hole while boiling as i forgot to do so, and also have listened more carefully to each change to the experiment.

    3. 1 word to describe your experience for this practical.

  8. 1. What are the 3 skills you have learnt during this practical session?

    The things that I have learnt are:

    - Safety measures when operating a bunsen burner and other lab rules
    - Wearing goggles
    - Not leaving bunsen burner unattended
    - Not stepping into a science lab unless there is a teacher around

    - The freezing point of naphthalene

    - Applying the concept of KPT to reality.

    2. What are the 2 things you can do better during practical?

    - Be more aware of my surroundings and lab rules when doing the practical

    - Plan my experiment more wisely beforehand, so I will not lose time during the practical itself.

    3. 1 word to describe your experience for this practical.

    - Rusty

  9. 1. What are the 3 skills you have learnt during this practical session?

    I have learnt to focus on the experiment to make sure that there isn't any accidents caused by the fire from the bunsen burner. I also learnt how to multitask better because I have to watch the time and to observe and record down the temperature as well. Finally, I learnt to make sense out of the results I have obtained because at first, I thought there was something wrong with my experiment set up because the thermometer registered the same temperature for 3 minutes, but then I found out that this was normal and reflect on the state where there are both in liquid and gaseous state.

    2. What are the 2 things you can do better during practical?

    The first thing I can do is to observe the temperature of the thermometer closer to eye level because most of the time, there wasn't enough time to shift my eye sight to eye level and be as close to the current 30 second interval. The second thing I can improve on to focus more and to rely on myself more because I have been getting help a lot of time(s) from other people (people beside me).

    3. 1 word to describe your experience for this practical.


  10. 1. What are the 3 skills you have learnt during this practical session?
    I learnt the proper ways to operate a bunsen burner (like safety precautions: to switch off the gas of the bunsen burner if it still doesn't light up after trying for awhile.) I learnt that safety in the lab is very important and even seemingly small rules like wear safety goggles when operating the bunsen burner should be followed. I learnt that when you observe results, you have to make sure that there is no parallax error by observing at eye level.

    2. What are the 2 things you can do better during practical?
    I should have read the instructions thoroughly making sure I was clear on what to do before starting. Be aware of my surroundings.

    3. 1 word to describe your experience for this practical.

  11. The three skills I learnt are that first, I should be very careful about the experimental equipment. This is because if we play or fool around during any practical, we might get hurt, such as getting burnt by the Bunsen burner and spilling hot water onto yourself or friends. Secondly, we should observe carefully and be concentrated into the practical or then we can miss out minute steps and observations. Thirdly,is to understand the main objective of the experiment.

    Two things I should improve on is that I should read the instructions carefully and listen to the teacher's instructions so that I would not get anything wrong. I should also be good at time management so that I can finish the practical before the time is up.

    The one word is nostalgic..